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    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?
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    Scientific calculators are really good and so useful


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    (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
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    http://www.poundland.co.uk/scientific-calculator

    buy two in case the first one breaks
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    Any calculator is allowed unless it can do symbolic algebra manipulation
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    (Original post by Philip-flop)

    Are we allowed calculators that can work out quadratic equations?
    Yes.
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    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!!)
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    (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
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    (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.
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    (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).
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    (Original post by Student403)
    ...
    4/5. :cry2:
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    (Original post by Zacken)
    4/5. :cry2:
    LaTeX makes everything look prettier <:

    4.5/5 for you
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    Philip-flop or you can use the quadratic equation.
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    (Original post by ravioliyears)
    The one I wrote about does, yes.
    I don't think it factorises. It gives you the x values
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    (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.
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    (Original post by Zacken)
    Do you mean quadratic formula? I think he knows that already.
    Oh damn whoops
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    (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
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    (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.
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    (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
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    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!
 
 
 
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