9-18(y)(y)=

Solution for 9-18(y)(y)= equation:

Simplifying
9 + -18(y)(y) = 0

Multiply y * y
9 + -18y2 = 0

Solving
9 + -18y2 = 0

Solving for variable 'y'.

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

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

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

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

Divide each side by '-18'.
y2 = 0.5

Simplifying
y2 = 0.5

Take the square root of each side:
y = {-0.707106781, 0.707106781}