x^2-36=81

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Solution for x^2-36=81 equation: 


Simplifying
x2 + -36 = 81

Reorder the terms:
-36 + x2 = 81

Solving
-36 + x2 = 81

Solving for variable 'x'.

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

Add '36' to each side of the equation.
-36 + 36 + x2 = 81 + 36

Combine like terms: -36 + 36 = 0
0 + x2 = 81 + 36
x2 = 81 + 36

Combine like terms: 81 + 36 = 117
x2 = 117

Simplifying
x2 = 117

Take the square root of each side:
x = {-10.816653826, 10.816653826}

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