(X)(X)-18=225

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Solution for (X)(X)-18=225 equation: 


Simplifying
(X)(X) + -18 = 225

Multiply X * X
X2 + -18 = 225

Reorder the terms:
-18 + X2 = 225

Solving
-18 + X2 = 225

Solving for variable 'X'.

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

Add '18' to each side of the equation.
-18 + 18 + X2 = 225 + 18

Combine like terms: -18 + 18 = 0
0 + X2 = 225 + 18
X2 = 225 + 18

Combine like terms: 225 + 18 = 243
X2 = 243

Simplifying
X2 = 243

Take the square root of each side:
X = {-15.588457268, 15.588457268}

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