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Math Help - quadratic equations

  1. #1
    Newbie
    Joined
    May 2008
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    quadratic equations

    Hi, i really need to know how to solve these equations.
    I have an exam tomorrow and would love someone to help me.
    1)Factorise completely : 4P"cubed"Q-2PQ"squared"
    Sorry about the cubed and squared, its just to the power or 3 and 2, didnt no how to type it on here
    2) Solve Xsquared-3x-10=0

    Please help me
    Many thanks
    Matt
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  2. #2
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    Jan 2007
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    x^{2}-3x-10

    (x-5)(x+2)

    x=5

    x=-2
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  3. #3
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    earboth's Avatar
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    Quote Originally Posted by mattneedshelp View Post
    Hi, i really need to know how to solve these equations.
    I have an exam tomorrow and would love someone to help me.
    1)Factorise completely : 4P"cubed"Q-2PQ"squared"
    Sorry about the cubed and squared, its just to the power or 3 and 2, didnt no how to type it on here
    2) Solve Xsquared-3x-10=0

    Please help me
    Many thanks
    Matt
    to #1:

    4p^3q-2pq = 2q(2p^3-p) = 2q(p(2p^2-1)) = 2pq(2p^2-1)

    to #2.

    Use the formula to solve a quadratic equation. You should get x = -2 or x = 5
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  4. #4
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    May 2008
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    Thanks guys

    appreciated
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