Solve the equation using square roots. 7x^2 + 6 =13

x=1, x=-1

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

see description

Step-by-step explanation:

When you reflect a point across the y-axis, the y-coordinate remains the same, but the x-coordinate is transformed into its opposite (its sign is changed). Notice that B is 5 horizontal units to the right of the y-axis, and B' is 5 horizontal units to the left of the y-axis.