850000=x((x)(4)(.1))

Solution for 850000=x((x)(4)(.1)) equation:

Simplifying
850000 = x((x)(4)(0.1))

Reorder the terms for easier multiplication:
850000 = x(4 * 0.1x)

Multiply 4 * 0.1
850000 = x(0.4x)

Remove parenthesis around (0.4x)
850000 = x * 0.4x

Reorder the terms for easier multiplication:
850000 = 0.4x * x

Multiply x * x
850000 = 0.4x2

Solving
850000 = 0.4x2

Solving for variable 'x'.

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

Add '-0.4x2' to each side of the equation.
850000 + -0.4x2 = 0.4x2 + -0.4x2

Combine like terms: 0.4x2 + -0.4x2 = 0.0
850000 + -0.4x2 = 0.0

Add '-850000' to each side of the equation.
850000 + -850000 + -0.4x2 = 0.0 + -850000

Combine like terms: 850000 + -850000 = 0
0 + -0.4x2 = 0.0 + -850000
-0.4x2 = 0.0 + -850000

Combine like terms: 0.0 + -850000 = -850000
-0.4x2 = -850000

Divide each side by '-0.4'.
x2 = 2125000

Simplifying
x2 = 2125000

Take the square root of each side:
x = {-1457.737973711, 1457.737973711}