Hey there! Sign in to join this conversationNew here? Join for free

What model calculator do you use for A level Maths? Watch

    • Thread Starter
    Offline

    18
    ReputationRep:
    Just wondering what calculator some of you people use for A-level Maths?

    I'm using a CASIO fx-85GT PLUS but was wondering what calculators you would recommend.

    Are we allowed calculators that can work out quadratic equations?
    Offline

    3
    ReputationRep:
    Scientific calculators are really good and so useful


    Posted from TSR Mobile
    Offline

    18
    ReputationRep:
    (Original post by Philip-flop)
    Just wondering what calculator some of you people use for A-level Maths?

    I'm using a CASIO fx-85GT PLUS but was wondering what calculators you would recommend.

    Are we allowed calculators that can work out quadratic equations?
    Hi there. I use a Casio fx-991ES Plus, and a lot of people I know use that too. You can use any Scientific Clauclator for A Level Maths as I don't it would make a difference. If you want to know about which calculators you can use, it usually says at the front of a C2 paper which calculators students ARE NOT allowed to use. Hope this helps
    Offline

    20
    ReputationRep:
    http://www.poundland.co.uk/scientific-calculator

    buy two in case the first one breaks
    Offline

    12
    ReputationRep:
    Any calculator is allowed unless it can do symbolic algebra manipulation
    Offline

    22
    ReputationRep:
    (Original post by Philip-flop)

    Are we allowed calculators that can work out quadratic equations?
    Yes.
    • Thread Starter
    Offline

    18
    ReputationRep:
    Thanks guys. I know you can use a calculator to work out a quadratic equation using the quadratic formula but, is there a way of using a calculator to help factorise a quadratic equation? (Sorry if I sound like such a newbie, I'm a mature student and have only been learning A-level Maths since October but before this I hadn't studied Maths since I was at school 7 years ago!!)
    Offline

    18
    ReputationRep:
    (Original post by Philip-flop)
    Thanks guys. I know you can use a calculator to work out a quadratic equation using the quadratic formula but, is there a way of using a calculator to help factorise a quadratic equation? (Sorry if I sound like such a newbie, I'm a mature student and have only been learning A-level Maths since October but before this I hadn't studied Maths since I was at school 7 years ago!!)
    Nope but here's an easy trick

    Let's say you get x = -1, x = 5/3

    All you have to do is rearrange to get 0 on one side, for each one

    First one would be easy
    (x+1) = 0

    Second one:

    x = 5/3
    3x = 5
    (3x - 5) = 0

    Then multiply the two together to get your factorised quadratic

    (x+1)(3x-5)=0
    Offline

    18
    ReputationRep:
    (Original post by Philip-flop)
    Thanks guys. I know you can use a calculator to work out a quadratic equation using the quadratic formula but, is there a way of using a calculator to help factorise a quadratic equation? (Sorry if I sound like such a newbie, I'm a mature student and have only been learning A-level Maths since October but before this I hadn't studied Maths since I was at school 7 years ago!!)
    The one I wrote about does, yes.
    Offline

    22
    ReputationRep:
    (Original post by Philip-flop)
    Thanks guys. I know you can use a calculator to work out a quadratic equation using the quadratic formula but, is there a way of using a calculator to help factorise a quadratic equation? (Sorry if I sound like such a newbie, I'm a mature student and have only been learning A-level Maths since October but before this I hadn't studied Maths since I was at school 7 years ago!!)
    If you put in a quadratic equation x^2 + bx + c = 0 into your calculator and it tells you that the roots/solutions are \alpha and \beta, then your quadratic is factorised as (x-\alpha)(x-\beta). If this sounds foreign to you, then let's try an example.

    We have x^2 -7x + 10 = 0, plug this into your calculator. Your calculator will show you that the roots are x=5 or x=2. This means that the quadratic factorises as (x-5)(x-2).
    Offline

    22
    ReputationRep:
    (Original post by Student403)
    ...
    4/5. :cry2:
    Offline

    18
    ReputationRep:
    (Original post by Zacken)
    4/5. :cry2:
    LaTeX makes everything look prettier <:

    4.5/5 for you
    Offline

    18
    ReputationRep:
    Philip-flop or you can use the quadratic equation.
    Offline

    18
    ReputationRep:
    (Original post by ravioliyears)
    The one I wrote about does, yes.
    I don't think it factorises. It gives you the x values
    Offline

    22
    ReputationRep:
    (Original post by Philip-flop)
    Thanks guys. I know you can use a calculator to work out a quadratic equation using the quadratic formula but, is there a way of using a calculator to help factorise a quadratic equation? (Sorry if I sound like such a newbie, I'm a mature student and have only been learning A-level Maths since October but before this I hadn't studied Maths since I was at school 7 years ago!!)
    (Original post by ravioliyears)
    Philip-flop or you can use the quadratic equation.
    Do you mean quadratic formula? I think he knows that already.
    Offline

    18
    ReputationRep:
    (Original post by Zacken)
    Do you mean quadratic formula? I think he knows that already.
    Oh damn whoops
    • Thread Starter
    Offline

    18
    ReputationRep:
    (Original post by ravioliyears)
    The one I wrote about does, yes.
    Hi ravioliyears,

    So you're saying that the CASIO fx-991ESPLUS can factorise an equation for me?

    For example:

    3x^2 - 2x - 8 = 0

    the calculator will give the following answer...

    (3x + 4)(x - 2) = 0

    or will the calculator just give the answers in terms of x...

    x = - 4/3 , x = 2



    I was never taught how to work out quadratics using a calculator back at school so have a huge gap in my knowledge. I just want to know how as I sometimes spend a long time trying to work them out in my head
    Offline

    18
    ReputationRep:
    (Original post by Philip-flop)
    Hi ravioliyears,

    So you're saying that the CASIO fx-991ESPLUS can factorise an equation for me?

    For example:

    3x^2 - 2x - 8 = 0

    the calculator will give the following answer...

    (3x + 4)(x - 2) = 0

    or will the calculator just give the answers in terms of x...

    x = - 4/3 , x = 2



    I was never taught how to work out quadratics using a calculator back at school so have a huge gap in my knowledge. I just want to know how as I sometimes spend a long time trying to work them out in my head
    The answer be given in terms of x. You'll need to rearrange.
    Offline

    18
    ReputationRep:
    (Original post by Philip-flop)
    Hi ravioliyears,

    So you're saying that the CASIO fx-991ESPLUS can factorise an equation for me?

    For example:

    3x^2 - 2x - 8 = 0

    the calculator will give the following answer...

    (3x + 4)(x - 2) = 0

    or will the calculator just give the answers in terms of x...

    x = - 4/3 , x = 2



    I was never taught how to work out quadratics using a calculator back at school so have a huge gap in my knowledge. I just want to know how as I sometimes spend a long time trying to work them out in my head
    It will give you x = -4/3, x = 2

    Not factorise
    Offline

    3
    ReputationRep:
    I use a CASIO FX-911ES Plus but also have a TI-84 as back up. I personally work a lot faster with the CASIO, but the TI is very powerful in the right hands!
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Brussels sprouts
    Useful resources

    Make your revision easier

    Maths

    Maths Forum posting guidelines

    Not sure where to post? Read the updated guidelines here

    Equations

    How to use LaTex

    Writing equations the easy way

    Student revising

    Study habits of A* students

    Top tips from students who have already aced their exams

    Study Planner

    Create your own Study Planner

    Never miss a deadline again

    Polling station sign

    Thinking about a maths degree?

    Chat with other maths applicants

    Can you help? Study help unanswered threads

    Groups associated with this forum:

    View associated groups
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.