U^2-1=0

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Solution for U^2-1=0 equation: 


Simplifying
U2 + -1 = 0

Reorder the terms:
-1 + U2 = 0

Solving
-1 + U2 = 0

Solving for variable 'U'.

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

Add '1' to each side of the equation.
-1 + 1 + U2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + U2 = 0 + 1
U2 = 0 + 1

Combine like terms: 0 + 1 = 1
U2 = 1

Simplifying
U2 = 1

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

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