x^2-36=21

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Solution for x^2-36=21 equation: 


Simplifying
x2 + -36 = 21

Reorder the terms:
-36 + x2 = 21

Solving
-36 + x2 = 21

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 = 21 + 36

Combine like terms: -36 + 36 = 0
0 + x2 = 21 + 36
x2 = 21 + 36

Combine like terms: 21 + 36 = 57
x2 = 57

Simplifying
x2 = 57

Take the square root of each side:
x = {-7.549834435, 7.549834435}

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