x^2+x^2+9=269

Solution for x^2+x^2+9=269 equation:

Simplifying
x2 + x2 + 9 = 269

Reorder the terms:
9 + x2 + x2 = 269

Combine like terms: x2 + x2 = 2x2
9 + 2x2 = 269

Solving
9 + 2x2 = 269

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + 2x2 = 269 + -9

Combine like terms: 9 + -9 = 0
0 + 2x2 = 269 + -9
2x2 = 269 + -9

Combine like terms: 269 + -9 = 260
2x2 = 260

Divide each side by '2'.
x2 = 130

Simplifying
x2 = 130

Take the square root of each side:
x = {-11.401754251, 11.401754251}