10+x*x+x*x=18

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Solution for 10+x*x+x*x=18 equation: 


Simplifying
10 + x * x + x * x = 18

Multiply x * x
10 + x2 + x * x = 18

Multiply x * x
10 + x2 + x2 = 18

Combine like terms: x2 + x2 = 2x2
10 + 2x2 = 18

Solving
10 + 2x2 = 18

Solving for variable 'x'.

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

Add '-10' to each side of the equation.
10 + -10 + 2x2 = 18 + -10

Combine like terms: 10 + -10 = 0
0 + 2x2 = 18 + -10
2x2 = 18 + -10

Combine like terms: 18 + -10 = 8
2x2 = 8

Divide each side by '2'.
x2 = 4

Simplifying
x2 = 4

Take the square root of each side:
x = {-2, 2}

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