Question 346184
(x + 1)(x - 2) = 4

x^2 - x - 2 = 4

x^2 - x - 2 -4 = 0

x^2 - x - 6 = 0

(x - 3)(x + 2) = 0

Set each factor to zero and solve for x.

x - 3 = 0

x = 3

AND

x + 2 = 0

x = -2

Final answer: x = 3 and x = -2.