f(x)=(x)(18-2x)(18-2x)

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Solution for f(x)=(x)(18-2x)(18-2x) equation: 


Simplifying
f(x) = (x)(18 + -2x)(18 + -2x)

Multiply f * x
fx = (x)(18 + -2x)(18 + -2x)

Multiply (18 + -2x) * (18 + -2x)
fx = x(18(18 + -2x) + -2x * (18 + -2x))
fx = x((18 * 18 + -2x * 18) + -2x * (18 + -2x))
fx = x((324 + -36x) + -2x * (18 + -2x))
fx = x(324 + -36x + (18 * -2x + -2x * -2x))
fx = x(324 + -36x + (-36x + 4x2))

Combine like terms: -36x + -36x = -72x
fx = x(324 + -72x + 4x2)
fx = (324 * x + -72x * x + 4x2 * x)
fx = (324x + -72x2 + 4x3)

Solving
fx = 324x + -72x2 + 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 = 324 + -72x + 4x2

Simplifying
f = 324 + -72x + 4x2

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