fx=x(50-2x)(30-2x)

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Solution for fx=x(50-2x)(30-2x) equation: 


Simplifying
fx = x(50 + -2x)(30 + -2x)

Multiply (50 + -2x) * (30 + -2x)
fx = x(50(30 + -2x) + -2x * (30 + -2x))
fx = x((30 * 50 + -2x * 50) + -2x * (30 + -2x))
fx = x((1500 + -100x) + -2x * (30 + -2x))
fx = x(1500 + -100x + (30 * -2x + -2x * -2x))
fx = x(1500 + -100x + (-60x + 4x2))

Combine like terms: -100x + -60x = -160x
fx = x(1500 + -160x + 4x2)
fx = (1500 * x + -160x * x + 4x2 * x)
fx = (1500x + -160x2 + 4x3)

Solving
fx = 1500x + -160x2 + 4x3

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 1500 + -160x + 4x2

Simplifying
f = 1500 + -160x + 4x2

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