=2y^2-18

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Solution for =2y^2-18 equation: 


Simplifying
0 = 2y2 + -18

Reorder the terms:
0 = -18 + 2y2

Solving
0 = -18 + 2y2

Solving for variable 'y'.

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

Add '-2y2' to each side of the equation.
0 + -2y2 = -18 + 2y2 + -2y2
Remove the zero:
-2y2 = -18 + 2y2 + -2y2

Combine like terms: 2y2 + -2y2 = 0
-2y2 = -18 + 0
-2y2 = -18

Divide each side by '-2'.
y2 = 9

Simplifying
y2 = 9

Take the square root of each side:
y = {-3, 3}

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