9y^2-18=0

Solution for 9y^2-18=0 equation:

Simplifying
9y2 + -18 = 0

Reorder the terms:
-18 + 9y2 = 0

Solving
-18 + 9y2 = 0

Solving for variable 'y'.

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

Add '18' to each side of the equation.
-18 + 18 + 9y2 = 0 + 18

Combine like terms: -18 + 18 = 0
0 + 9y2 = 0 + 18
9y2 = 0 + 18

Combine like terms: 0 + 18 = 18
9y2 = 18

Divide each side by '9'.
y2 = 2

Simplifying
y2 = 2

Take the square root of each side:
y = {-1.414213562, 1.414213562}