2y^2-1=0

Solution for 2y^2-1=0 equation:

Simplifying
2y2 + -1 = 0

Reorder the terms:
-1 + 2y2 = 0

Solving
-1 + 2y2 = 0

Solving for variable 'y'.

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

Add '1' to each side of the equation.
-1 + 1 + 2y2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 2y2 = 0 + 1
2y2 = 0 + 1

Combine like terms: 0 + 1 = 1
2y2 = 1

Divide each side by '2'.
y2 = 0.5

Simplifying
y2 = 0.5

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