X^2+21=190

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Solution for X^2+21=190 equation: 


Simplifying
X2 + 21 = 190

Reorder the terms:
21 + X2 = 190

Solving
21 + X2 = 190

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 = 190 + -21

Combine like terms: 21 + -21 = 0
0 + X2 = 190 + -21
X2 = 190 + -21

Combine like terms: 190 + -21 = 169
X2 = 169

Simplifying
X2 = 169

Take the square root of each side:
X = {-13, 13}

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