Answer:
x = 1 or -2
Step-by-step explanation:
a denominator cannot be zero.
x - 1 = 0 at x = 1
x + 2 = 0 at x = -2
x² + x - 2 = 0 at (-1 ±√(1² - 4(1)(-2))) / (2(1)) = (-1 ± 3)/2 = 1 or -2 both of which we have found already.
