Question

Select the quadratic that has roots x=8 and x=-5 a x^2 + 3x -40
B x^2-3x-40
C x^2 + 13x +40
Dx^2-13x+40

Answer 1

If x = 8, then the factor is (x - 8); likewise, if x = -5, then the factor is (x + 5).  FOIL those together and get B