benr9887 benr9887
  • 20-08-2021
  • Mathematics
contestada

given: x+21=7(x+9)
Find: x^2+5x

Respuesta :

yiyantan26
yiyantan26 yiyantan26
  • 20-08-2021

Answer:

14

Step-by-step explanation:

x+21=7(x+9)

x+21=7x+63

-6x=42

x=-7

(-7)^2+5(-7)

=49+(-35)

=49-35

=14

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