Respuesta :

Answer:

x=1

Step-by-step explanation:

Take the root of both sides and solve

Answer: x=1, x=-1

  1. Step-by-step explanation

7x^2+6-6=13-6

7x^2/7=7/7

x^2=1

x=square root(-1)                  square root(1)

negative goes outside

the square root

         x=-1                          x=1