4ddjhjha24 4ddjhjha24
  • 14-01-2021
  • Mathematics
contestada

Which expression is a factor of both x^2-9 and x^2+8x+15

Respuesta :

NagThiriKo
NagThiriKo NagThiriKo
  • 14-01-2021

Step-by-step explanation:

  • x^2-9=0
  • x^2+8x+15=0

(x+5)(x+3)=0

x+5=0 or x+3=0

x=-5or x=-3

  • x=-5 in x^2-9=0

(-5)^2-9=0

10-9=0

1=0

  • x=-3 in x^2-9=0

(-3)^2-9=0

9-9=0

0=0

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