260=x*(x*0.6)

Solution for 260=x*(x*0.6) equation:

Simplifying
260 = x(x * 0.6)

Reorder the terms for easier multiplication:
260 = x(0.6x)

Remove parenthesis around (0.6x)
260 = x * 0.6x

Reorder the terms for easier multiplication:
260 = 0.6x * x

Multiply x * x
260 = 0.6x2

Solving
260 = 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.
260 + -0.6x2 = 0.6x2 + -0.6x2

Combine like terms: 0.6x2 + -0.6x2 = 0.0
260 + -0.6x2 = 0.0

Add '-260' to each side of the equation.
260 + -260 + -0.6x2 = 0.0 + -260

Combine like terms: 260 + -260 = 0
0 + -0.6x2 = 0.0 + -260
-0.6x2 = 0.0 + -260

Combine like terms: 0.0 + -260 = -260
-0.6x2 = -260

Divide each side by '-0.6'.
x2 = 433.3333333

Simplifying
x2 = 433.3333333

Take the square root of each side:
x = {-20.816659994, 20.816659994}