Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    2
    ReputationRep:
    Are equal roots also real roots?
    Offline

    22
    ReputationRep:
    (Original post by Bigbosshead)
    Are equal roots also real roots?
    Depends. Given this is C1 and you're working in the reals, then yes.
    Offline

    1
    ReputationRep:
    Equal roots = one real root.
    Offline

    20
    ReputationRep:
    For the purposes of C1, yes. It's not true generally though.
    • Thread Starter
    Offline

    2
    ReputationRep:
    If it is said, find the real roots, do we equate the expression to greater than 0 or greater than or equal to zero?
    Offline

    2
    ReputationRep:
    Hey! Is this for OCR MEI?
    Offline

    22
    ReputationRep:
    (Original post by Bigbosshead)
    If it is said, find the real roots, do we equate the expression to greater than 0 or greater than or equal to zero?
    The equation is equated to 0. The discriminant is set to greater than or equal to 0.
    • Thread Starter
    Offline

    2
    ReputationRep:
    Just maths in general, so probably.
    • Thread Starter
    Offline

    2
    ReputationRep:
    so ≥0?
    Offline

    22
    ReputationRep:
    (Original post by Bigbosshead)
    so ≥0?
    discriminant \geq 0.
    Offline

    6
    ReputationRep:
    The discriminant only shows you the number of real roots- greater than 0 means 2 real roots, less than 0 means no real roots ( no interesection with x axis) and equal to 0 means there is only one real root.

    To find the value of the roots you have to factorise/ complete the square/ use the quadratic formula and solve.
    Offline

    1
    ReputationRep:
    Anyone have a link to some of the hardest or weirdest questions o fC1
    Offline

    3
    ReputationRep:
    (Original post by greg.h.nm)
    Anyone have a link to some of the hardest or weirdest questions o fC1
    Try Solomon Papers for C1
    Offline

    1
    ReputationRep:
    I have my C1 exam tomorrow. Any tips!!!
    Offline

    1
    ReputationRep:
    (Original post by Psraim)
    Equal roots = one real root.
    By using discrimenent:
    b2 - 4ac=0 only 1 root (answer for ur Q)
    b2 - 4ac>0 2 roots
    b2 - 4ac<0 no roots, so can't be solved.
 
 
 
  • 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
    Would you like to hibernate through the winter months?
    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.