Answer:
(x - 3)(x + 5)
Explanation:
x² + 2x - 15
consider the factors of the constant term (- 15) which sum to give the coefficient of the x- term (+ 2)
the factors are - 3 and + 5 , since
- 3 × + 5 = - 15 and - 3 + 5 = + 2 , then
x² + 2x - 15
= (x - 3)(x + 5) ← in factored form