A^2-1=3

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Solution for A^2-1=3 equation: 


Simplifying
A2 + -1 = 3

Reorder the terms:
-1 + A2 = 3

Solving
-1 + A2 = 3

Solving for variable 'A'.

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

Add '1' to each side of the equation.
-1 + 1 + A2 = 3 + 1

Combine like terms: -1 + 1 = 0
0 + A2 = 3 + 1
A2 = 3 + 1

Combine like terms: 3 + 1 = 4
A2 = 4

Simplifying
A2 = 4

Take the square root of each side:
A = {-2, 2}

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