v(x)=x(20-2x)(8-2x)

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Solution for v(x)=x(20-2x)(8-2x) equation: 


Simplifying
v(x) = x(20 + -2x)(8 + -2x)

Multiply v * x
vx = x(20 + -2x)(8 + -2x)

Multiply (20 + -2x) * (8 + -2x)
vx = x(20(8 + -2x) + -2x * (8 + -2x))
vx = x((8 * 20 + -2x * 20) + -2x * (8 + -2x))
vx = x((160 + -40x) + -2x * (8 + -2x))
vx = x(160 + -40x + (8 * -2x + -2x * -2x))
vx = x(160 + -40x + (-16x + 4x2))

Combine like terms: -40x + -16x = -56x
vx = x(160 + -56x + 4x2)
vx = (160 * x + -56x * x + 4x2 * x)
vx = (160x + -56x2 + 4x3)

Solving
vx = 160x + -56x2 + 4x3

Solving for variable 'v'.

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

Divide each side by 'x'.
v = 160 + -56x + 4x2

Simplifying
v = 160 + -56x + 4x2

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