x^2+18=243

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Solution for x^2+18=243 equation: 


Simplifying
x2 + 18 = 243

Reorder the terms:
18 + x2 = 243

Solving
18 + x2 = 243

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 = 243 + -18

Combine like terms: 18 + -18 = 0
0 + x2 = 243 + -18
x2 = 243 + -18

Combine like terms: 243 + -18 = 225
x2 = 225

Simplifying
x2 = 225

Take the square root of each side:
x = {-15, 15}

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