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Math Help - factorization.

  1. #1
    Junior Member
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    Smile factorization.

    factorize:
    D(x)=x^2-20x+100-2(10-x)(x+1).

    f(x)=(2x-6)(2x-1)+4-x^2.

    a(x)=(2x-3)(x+5)-4x^2+9.

    thnx...
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  2. #2
    Member TheMasterMind's Avatar
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    Quote Originally Posted by lebanon View Post
    factorize:
    D(x)=x^2-20x+100-2(10-x)(x+1).

    f(x)=(2x-6)(2x-1)+4-x^2.

    a(x)=(2x-3)(x+5)-4x^2+9.

    thnx...
    first things first foil the brackets and collect like terms...
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  3. #3
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    ya i knew..
    but,
    d(x)=(x-10)^2-2(10-x)(x+1).
    and,
    f(x)=(2x-6)(2x-1)+(2-x)(2=x)
    and i didn't get a(x).
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  4. #4
    MHF Contributor
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    Hi

    a(x) = (2x-3)(x+5)-4x^2+9

    a(x) = (2x-3)(x+5)-(4x^2-9)

    a(x) = (2x-3)(x+5)-(2x-3)(2x+3)
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