Question

Factor: x2 + 2x - 15

Answer 1

x^2 + 2x - 15
x^2 + 5x - 3x - 15
x(x + 5) - 3(x + 5)
(x + 5)(x - 3)
x = 3 or x = -5

Answer 2

\[y = x ^{2} + 2x - 15 \] just use quadratic formula or do what fall did.... either way you get the same answer

then

then put in brackets and swtich the positive to negative and the negative to positive to get (x+5)(x-3)