4y^2+54-90=0

Solution for 4y^2+54-90=0 equation:

Simplifying
4y2 + 54 + -90 = 0

Reorder the terms:
54 + -90 + 4y2 = 0

Combine like terms: 54 + -90 = -36
-36 + 4y2 = 0

Solving
-36 + 4y2 = 0

Solving for variable 'y'.

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

Add '36' to each side of the equation.
-36 + 36 + 4y2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + 4y2 = 0 + 36
4y2 = 0 + 36

Combine like terms: 0 + 36 = 36
4y2 = 36

Divide each side by '4'.
y2 = 9

Simplifying
y2 = 9

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