X^2-5=21

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Solution for X^2-5=21 equation: 


Simplifying
X2 + -5 = 21

Reorder the terms:
-5 + X2 = 21

Solving
-5 + X2 = 21

Solving for variable 'X'.

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

Add '5' to each side of the equation.
-5 + 5 + X2 = 21 + 5

Combine like terms: -5 + 5 = 0
0 + X2 = 21 + 5
X2 = 21 + 5

Combine like terms: 21 + 5 = 26
X2 = 26

Simplifying
X2 = 26

Take the square root of each side:
X = {-5.099019514, 5.099019514}

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