sheeshee36 sheeshee36
  • 14-03-2019
  • Mathematics
contestada

I don’t know how to do it

I dont know how to do it class=

Respuesta :

hurryburning
hurryburning hurryburning
  • 04-04-2021

Answer:

x^2 - 10 + 5

Step-by-step explanation:

3x^2 - 6x - 7 + -2x^2 - 4x + 12

3x^2 - 6x - 7 - 2x^2 - 4x + 12

Group like terms:

3x^2 - 2x^2 - 6x - 4x - 7 + 12

Add similar elements:

3x^2 - 2x^2 = x^2

x^2 - 6x - 4x - 7 + 12

-6x - 4x = -10x

x^2 - 10x - 7 + 12

-7 + 12 = 5

x^2 - 10 + 5

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