2y^2-40=0

Solution for 2y^2-40=0 equation:

Simplifying
2y2 + -40 = 0

Reorder the terms:
-40 + 2y2 = 0

Solving
-40 + 2y2 = 0

Solving for variable 'y'.

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

Add '40' to each side of the equation.
-40 + 40 + 2y2 = 0 + 40

Combine like terms: -40 + 40 = 0
0 + 2y2 = 0 + 40
2y2 = 0 + 40

Combine like terms: 0 + 40 = 40
2y2 = 40

Divide each side by '2'.
y2 = 20

Simplifying
y2 = 20

Take the square root of each side:
y = {-4.472135955, 4.472135955}