x*x+x*x=20

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Solution for x*x+x*x=20 equation: 


Simplifying
x * x + x * x = 20

Multiply x * x
x2 + x * x = 20

Multiply x * x
x2 + x2 = 20

Combine like terms: x2 + x2 = 2x2
2x2 = 20

Solving
2x2 = 20

Solving for variable 'x'.

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

Divide each side by '2'.
x2 = 10

Simplifying
x2 = 10

Take the square root of each side:
x = {-3.16227766, 3.16227766}

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