Answer:
y=-8 or y=8
Explanation:
First you swap the sides of the question:
y^2=64
then you simplify the equation and take the square root of both sides of the equation and remember to use both positive and negative roots:
y= + 8 (make sure the "+" has the line under it that looks like this _)
Then you separate the solution and write the solutions, with a + sign and - sign, which gives you your solution:
y=-8
y=8
or
y1=-8 , y2=8