V=(30-2x)(40-2x)(x)

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Solution for V=(30-2x)(40-2x)(x) equation: 


Simplifying
V = (30 + -2x)(40 + -2x)(x)

Reorder the terms for easier multiplication:
V = x(30 + -2x)(40 + -2x)

Multiply (30 + -2x) * (40 + -2x)
V = x(30(40 + -2x) + -2x * (40 + -2x))
V = x((40 * 30 + -2x * 30) + -2x * (40 + -2x))
V = x((1200 + -60x) + -2x * (40 + -2x))
V = x(1200 + -60x + (40 * -2x + -2x * -2x))
V = x(1200 + -60x + (-80x + 4x2))

Combine like terms: -60x + -80x = -140x
V = x(1200 + -140x + 4x2)
V = (1200 * x + -140x * x + 4x2 * x)
V = (1200x + -140x2 + 4x3)

Solving
V = 1200x + -140x2 + 4x3

Solving for variable 'V'.

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

Simplifying
V = 1200x + -140x2 + 4x3

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