math

how do you factor -x^2-7x+10? thanks much

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  1. First, factor out a negative.
    -(x^2 + 7x - 10)

    -(x + 2)(x + 5)
    Actually, it's not factorable. The only factors of 10 are 5 and 2. The 5 and 2 have to add up to be 7, so they both must be positive. However, the product of 5 and 2 must be -10, which cannot happen.

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  2. Is it possible to factor -4x^2-8x+16?

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  3. you can't factor it from there though, can you?

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