Answer:
(x + 6)(x - 2)
Explanation:
To factor the quadratic
Consider the factors of the constant term (- 12) which sum to give the coefficient of the x- term ( + 4)
The factors are + 6 and - 2 since
+ 6 × - 2 = - 12 and + 6 - 2 = + 4, hence
x² + 4x - 12 = (x + 6)(x - 2)