X^2-21=60

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Solution for X^2-21=60 equation: 


Simplifying
X2 + -21 = 60

Reorder the terms:
-21 + X2 = 60

Solving
-21 + X2 = 60

Solving for variable 'X'.

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

Add '21' to each side of the equation.
-21 + 21 + X2 = 60 + 21

Combine like terms: -21 + 21 = 0
0 + X2 = 60 + 21
X2 = 60 + 21

Combine like terms: 60 + 21 = 81
X2 = 81

Simplifying
X2 = 81

Take the square root of each side:
X = {-9, 9}

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