heavennotes heavennotes

02-05-2021
Mathematics

contestada

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

a 97b 97c 79d 97e 97 class=

Respuesta :

mathstudent55 mathstudent55

02-05-2021

Answer:

a) 9/7

Step-by-step explanation:

[tex] \dfrac{x^2 + x - 20}{x^2 - x - 12} = [/tex]

[tex] = \dfrac{(x + 5)(x - 4)}{(x + 3)(x - 4)} [/tex]

[tex] = \dfrac{x + 5}{x + 3} [/tex]

x = 4

[tex] = \dfrac{4 + 5}{4 + 3} [/tex]

[tex] = \dfrac{9}{7} [/tex]

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