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    • Thread Starter
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    Hi all,

    I'm currently teaching myself C1 quadratics and pretty much undrestand it. However I'm stuck on one set of questions, as I don't think I know what it's wanting me to put in the answer... I've done factorising and completing the square which these questions have followed:

    Solve the following quadratic equations. Leave surds in your answer.

    (a) (x-3)^2 -3 = 0

    (b) (x+2)^2 -4 = 0

    Can someone work through these two questions with me so that I can have a go at the other ones?

    Thanks,
    Sean
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    You tried getting x on it's own?
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    (Original post by Bleak Lemming)
    Hi all,

    I'm currently teaching myself C1 quadratics and pretty much undrestand it. However I'm stuck on one set of questions, as I don't think I know what it's wanting me to put in the answer... I've done factorising and completing the square which these questions have followed:

    Solve the following quadratic equations. Leave surds in your answer.

    (a) (x-3)^2 -3 = 0

    (b) (x+2)^2 -4 = 0

    Can someone work through these two questions with me so that I can have a go at the other ones?

    Thanks,
    Sean
    To solve a completing the square question after you've reached that step, you move the extra term to the other side of the equation then square root both sides ie

    a)(x-3)^2 -3=0
    (x-3)^2=3
    x-3=+or-sqrt3
    x=3+or-sqrt3
    The same thing can be done for b
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    (Original post by Bleak Lemming)
    Hi all,

    I'm currently teaching myself C1 quadratics and pretty much undrestand it. However I'm stuck on one set of questions, as I don't think I know what it's wanting me to put in the answer... I've done factorising and completing the square which these questions have followed:

    Solve the following quadratic equations. Leave surds in your answer.

    (a) (x-3)^2 -3 = 0

    (b) (x+2)^2 -4 = 0

    Can someone work through these two questions with me so that I can have a go at the other ones?

    Thanks,
    Sean
    Expand the brackets , simplify then solve using your preferrred method. Factorise,formula or completing the square.
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    (Original post by steve2005)
    Expand the brackets , simplify then solve using your preferrred method. Factorise,formula or completing the square.
    It looks to me like the square has already been completed.
 
 
 
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