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zhuklara [117]
3 years ago
9

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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