Ben B. answered • 11/13/14

Tutor

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Experience Aerospace Engineer with Master's Degree in Physics

Patricia,

Try factoring the polynomials, and see if one of the factors is the divisor. So for the first one,

x^2 + 7x + 10 = (x+2) (x + 5)

so, x+2 is one of the factors, so the answer is x+5.

For the 2nd one, note that x^-25= (x+5)(x-5)

and 2x-10= 2(x-5).