v=x(12-2x)(21-2x)

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Solution for v=x(12-2x)(21-2x) equation: 


Simplifying
v = x(12 + -2x)(21 + -2x)

Multiply (12 + -2x) * (21 + -2x)
v = x(12(21 + -2x) + -2x * (21 + -2x))
v = x((21 * 12 + -2x * 12) + -2x * (21 + -2x))
v = x((252 + -24x) + -2x * (21 + -2x))
v = x(252 + -24x + (21 * -2x + -2x * -2x))
v = x(252 + -24x + (-42x + 4x2))

Combine like terms: -24x + -42x = -66x
v = x(252 + -66x + 4x2)
v = (252 * x + -66x * x + 4x2 * x)
v = (252x + -66x2 + 4x3)

Solving
v = 252x + -66x2 + 4x3

Solving for variable 'v'.

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

Simplifying
v = 252x + -66x2 + 4x3

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