3 years ago

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

Mathematics

1 answer:

Studentka2010 [4]3 years ago

7 0

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

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

$= \dfrac{9}{7}$

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A) 9/7b) 9/-7c) 7/9d) -9/7e) -9/-7​

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