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help on factoring polynomials?

Okay, the problem is:

-x(cubed) + 16x(squared) - 60x

I have no idea where to start?!?!

5 Answers

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  • Anonymous
    1 decade ago
    Favorite Answer

    Let's use x3 to mean x cubed.

    So,

    -x3 + 16 x2 - 60x = (factor out x)

    x( -x2+16x -60) = (factor out minus sign)

    -x( x2-16x + 60) =

    -x(x-10)(x-6)

    You can also write this as:

    x(10-x)(x-6) (answer)

  • 1 decade ago

    First, factor out the -1. So, there is x^3 - 16x^2 + 60x = 0.

    Then, factor out the x: x(x^2 + -16x + 60) = 0.

    For the first factor, x = 0. For the other two . . .

    (x -10) (x - 6) = 0

    Because there are two factors equal to zero, one of them has to be 0. Any number times 0 equals 0.

    If one factor is 6, then 6-6=0. So, the other can be a number. x-10 = 0. x=10.

    If one factor is 10, then the other can be a number other than 0. x-6=0. x=6.

    Thus, x=10, 6, and 0. There are three real roots, because it is x^3. The exponent tells how many roots are there.

  • John W
    Lv 5
    1 decade ago

    -x(cubed) + 16x(squared) - 60x =

    -x{x(squared) - 16x + 60} =

    -x(x-6)(x-10)

  • 1 decade ago

    ok so first u take out the gcf which is x and then factor. so then you have x + 16 -60. and that's your answer!!! good luck on the rest of your hw!

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  • 1 decade ago

    answer = (x+6)(x+10)

    10+6=16

    10*6=60

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