algebra

The problem is factoring completely
4xX^2-20x-24
4(X^2-5x-60
4(x-6)(x+1)

12x^2-75
3(X^2-25)=3(X-25)(x+3)

Can someone check these problem for me please.

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asked by Betty C
  1. The first one, second line should read 4(x^2-5x-6). I think that's just a typo. For the 2nd one:
    12x^2-75
    3(x2-25)
    3(x-5)(x+5)

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    posted by Jen

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