720=2x*x

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Solution for 720=2x*x equation: 


Simplifying
720 = 2x * x

Multiply x * x
720 = 2x2

Solving
720 = 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.
720 + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
720 + -2x2 = 0

Add '-720' to each side of the equation.
720 + -720 + -2x2 = 0 + -720

Combine like terms: 720 + -720 = 0
0 + -2x2 = 0 + -720
-2x2 = 0 + -720

Combine like terms: 0 + -720 = -720
-2x2 = -720

Divide each side by '-2'.
x2 = 360

Simplifying
x2 = 360

Take the square root of each side:
x = {-18.973665961, 18.973665961}

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