9(y^2-100)=

Solution for 9(y^2-100)= equation:

Simplifying
9(y2 + -100) = 0

Reorder the terms:
9(-100 + y2) = 0
(-100 * 9 + y2 * 9) = 0
(-900 + 9y2) = 0

Solving
-900 + 9y2 = 0

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '900' to each side of the equation.
-900 + 900 + 9y2 = 0 + 900

Combine like terms: -900 + 900 = 0
0 + 9y2 = 0 + 900
9y2 = 0 + 900

Combine like terms: 0 + 900 = 900
9y2 = 900

Divide each side by '9'.
y2 = 100

Simplifying
y2 = 100

Take the square root of each side:
y = {-10, 10}