11=x^2+9+x^2

Solution for 11=x^2+9+x^2 equation:

Simplifying
11 = x2 + 9 + x2

Reorder the terms:
11 = 9 + x2 + x2

Combine like terms: x2 + x2 = 2x2
11 = 9 + 2x2

Solving
11 = 9 + 2x2

Solving for variable 'x'.

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

Add '-2x2' to each side of the equation.
11 + -2x2 = 9 + 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
11 + -2x2 = 9 + 0
11 + -2x2 = 9

Add '-11' to each side of the equation.
11 + -11 + -2x2 = 9 + -11

Combine like terms: 11 + -11 = 0
0 + -2x2 = 9 + -11
-2x2 = 9 + -11

Combine like terms: 9 + -11 = -2
-2x2 = -2

Divide each side by '-2'.
x2 = 1

Simplifying
x2 = 1

Take the square root of each side:
x = {-1, 1}