x^2-81=6

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Solution for x^2-81=6 equation: 


Simplifying
x2 + -81 = 6

Reorder the terms:
-81 + x2 = 6

Solving
-81 + x2 = 6

Solving for variable 'x'.

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

Add '81' to each side of the equation.
-81 + 81 + x2 = 6 + 81

Combine like terms: -81 + 81 = 0
0 + x2 = 6 + 81
x2 = 6 + 81

Combine like terms: 6 + 81 = 87
x2 = 87

Simplifying
x2 = 87

Take the square root of each side:
x = {-9.327379053, 9.327379053}

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