Answer:
x = -5, 3, -4 - i, -4 + i.
Step-by-step explanation:
(x^2 + 2x - 15)(x^2 + 8x + 17) = 0
(x^2 + 2x - 15) = 0
(x + 5)(x - 3) = 0
x = -5, 3.
x^2 + 8x + 17 = 0
Completing the square:
(x + 4)^2 - 16 = -17
(x + 4)^2 = -1
x + 4 = +/- i
x = -4 + i , -4 - i.
