kateer188 kateer188
  • 19-02-2021
  • Mathematics
contestada

PLEASE HELP QUICKLY!!!

x^2 + (x+9)^2 = 45^2

Respuesta :

nashwini160504
nashwini160504 nashwini160504
  • 19-02-2021

Step-by-step explanation:

x^2+(x+9)^2=90

x^2+(x+9)^2-90=0

x^2+x^2+9^2+2*x*9-90=0

x^2+x^2+81+18x-90=0

2x^2+18x-9=0

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