sami3524
sami3524 sami3524
  • 03-06-2019
  • Mathematics
contestada

-8x^2- [8x - 6x^2 - 8x)] - [7 + (-8x - 7)]

Respuesta :

gmany
gmany gmany
  • 05-07-2019

Answer:

[tex]\large\boxed{-8x^2-(8x-6x^2-8x)-[7-(-8x-7)]=-2x^2-8x-14}[/tex]

Step-by-step explanation:

[tex]-8x^2-(8x-6x^2-8x)-[7-(-8x-7)]\\\\=-8x^2-8x-(-6x^2)-(-8x)-[7-(-8x)-(-7)]\\\\=-8x^2-8x+6x^2+8x-(7+8x+7)\\\\=-8x^2-8x+6x^2+8x-7-8x-7\qquad\text{combine like terms}\\\\=(-8x^2+6x^2)+(-8x+8x-8x)+(-7-7)\\\\=-2x^2-8x-14[/tex]

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