2x^2+2x^2=8

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Solution for 2x^2+2x^2=8 equation: 


Simplifying
2x2 + 2x2 = 8

Combine like terms: 2x2 + 2x2 = 4x2
4x2 = 8

Solving
4x2 = 8

Solving for variable 'x'.

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

Divide each side by '4'.
x2 = 2

Simplifying
x2 = 2

Take the square root of each side:
x = {-1.414213562, 1.414213562}

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