Question

A) 9/7b) 9/-7c) 7/9d) -9/7e) -9/-7​

Answer 1

Answer:

a) 9/7

Step-by-step explanation:

$\dfrac{x^2 + x - 20}{x^2 - x - 12} =$

$= \dfrac{(x + 5)(x - 4)}{(x + 3)(x - 4)}$

$= \dfrac{x + 5}{x + 3}$

x = 4

$= \dfrac{4 + 5}{4 + 3}$

$= \dfrac{9}{7}$