200=x*0.6*x

Solution for 200=x*0.6*x equation:

Simplifying
200 = x * 0.6x

Reorder the terms for easier multiplication:
200 = 0.6x * x

Multiply x * x
200 = 0.6x2

Solving
200 = 0.6x2

Solving for variable 'x'.

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

Add '-0.6x2' to each side of the equation.
200 + -0.6x2 = 0.6x2 + -0.6x2

Combine like terms: 0.6x2 + -0.6x2 = 0.0
200 + -0.6x2 = 0.0

Add '-200' to each side of the equation.
200 + -200 + -0.6x2 = 0.0 + -200

Combine like terms: 200 + -200 = 0
0 + -0.6x2 = 0.0 + -200
-0.6x2 = 0.0 + -200

Combine like terms: 0.0 + -200 = -200
-0.6x2 = -200

Divide each side by '-0.6'.
x2 = 333.3333333

Simplifying
x2 = 333.3333333

Take the square root of each side:
x = {-18.257418583, 18.257418583}