Answer:
(x + 5)(x - 2)
Step-by-step explanation:
Given
x² + 3x - 10 ← expression on the denominator
Consider the factors of the constant term (- 10) which sum to give the coefficient of the x- term (+ 3)
The factors are + 5 and - 2, since
5 × - 2 = - 10 and 5 - 2 = + 3, thus
x² + 3x - 10 = (x + 5)(x - 2)
