357=2x*x

Solution for 357=2x*x equation:

Simplifying
357 = 2x * x

Multiply x * x
357 = 2x2

Solving
357 = 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.
357 + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
357 + -2x2 = 0

Add '-357' to each side of the equation.
357 + -357 + -2x2 = 0 + -357

Combine like terms: 357 + -357 = 0
0 + -2x2 = 0 + -357
-2x2 = 0 + -357

Combine like terms: 0 + -357 = -357
-2x2 = -357

Divide each side by '-2'.
x2 = 178.5

Simplifying
x2 = 178.5

Take the square root of each side:
x = {-13.360389216, 13.360389216}