243=x^2

Solution for 243=x^2 equation:

Simplifying
243 = x2

Solving
243 = x2

Solving for variable 'x'.

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

Add '-1x2' to each side of the equation.
243 + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
243 + -1x2 = 0

Add '-243' to each side of the equation.
243 + -243 + -1x2 = 0 + -243

Combine like terms: 243 + -243 = 0
0 + -1x2 = 0 + -243
-1x2 = 0 + -243

Combine like terms: 0 + -243 = -243
-1x2 = -243

Divide each side by '-1'.
x2 = 243

Simplifying
x2 = 243

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