64=x(x+x)

Solution for 64=x(x+x) equation:

Simplifying
64 = x(x + x)

Combine like terms: x + x = 2x
64 = x(2x)

Remove parenthesis around (2x)
64 = x * 2x

Reorder the terms for easier multiplication:
64 = 2x * x

Multiply x * x
64 = 2x2

Solving
64 = 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.
64 + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
64 + -2x2 = 0

Add '-64' to each side of the equation.
64 + -64 + -2x2 = 0 + -64

Combine like terms: 64 + -64 = 0
0 + -2x2 = 0 + -64
-2x2 = 0 + -64

Combine like terms: 0 + -64 = -64
-2x2 = -64

Divide each side by '-2'.
x2 = 32

Simplifying
x2 = 32

Take the square root of each side:
x = {-5.656854249, 5.656854249}