Question

A) 9/7
b) 9/-7
c) 7/9
d) -9/7
e) -9/-7​

Answer 1

a) 9/7

Explanation:

`(x^2 + x - 20)/(x^2 - x - 12) =`

`= ((x + 5)(x - 4))/((x + 3)(x - 4))`

`= (x + 5)/(x + 3)`

x = 4

`= (4 + 5)/(4 + 3)`

`= (9)/(7)`