=X^2-1

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Solution for =X^2-1 equation: 


Simplifying
0 = X2 + -1

Reorder the terms:
0 = -1 + X2

Solving
0 = -1 + X2

Solving for variable 'X'.

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

Add '-1X2' to each side of the equation.
0 + -1X2 = -1 + X2 + -1X2
Remove the zero:
-1X2 = -1 + X2 + -1X2

Combine like terms: X2 + -1X2 = 0
-1X2 = -1 + 0
-1X2 = -1

Divide each side by '-1'.
X2 = 1

Simplifying
X2 = 1

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

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