9y^2-15=0

Solution for 9y^2-15=0 equation:

Simplifying
9y2 + -15 = 0

Reorder the terms:
-15 + 9y2 = 0

Solving
-15 + 9y2 = 0

Solving for variable 'y'.

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

Add '15' to each side of the equation.
-15 + 15 + 9y2 = 0 + 15

Combine like terms: -15 + 15 = 0
0 + 9y2 = 0 + 15
9y2 = 0 + 15

Combine like terms: 0 + 15 = 15
9y2 = 15

Divide each side by '9'.
y2 = 1.666666667

Simplifying
y2 = 1.666666667

Take the square root of each side:
y = {-1.290994449, 1.290994449}