(y^2-1)=

Solution for (y^2-1)= equation:

Simplifying
(y2 + -1) = 0

Reorder the terms:
(-1 + y2) = 0

Remove parenthesis around (-1 + y2)
-1 + y2 = 0

Solving
-1 + y2 = 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 + y2 = 0 + 1

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

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

Simplifying
y2 = 1

Take the square root of each side:
y = {-1, 1}