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Math Help - Quadratic In Form U Substitution

  1. #1
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    Question Quadratic In Form U Substitution

    If anyone could please me on these. I am stuck


    1.) (3x-1)2+2(3x-1)-15=0


    2.) a-10√(a)+9=0


    3.) (5-√(x))2+5(5-√(x))-24=0
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  2. #2
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    Re: Quadratic In Form U Substitution

    Quote Originally Posted by VIPClark View Post
    1.) (3x-1)2+2(3x-1)-15=0

    2.) a-10√(a)+9=0

    3.) (5-√(x))2+5(5-√(x))-24=0
    1) Solve u^2+2u-15=0

    2) Solve u^2-10u+9=0

    3) Solve u^2+5u-24=0
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