f(x)=4x(10x^3)

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Solution for f(x)=4x(10x^3) equation: 


Simplifying
f(x) = 4x(10x3)

Multiply f * x
fx = 4x(10x3)

Remove parenthesis around (10x3)
fx = 4x * 10x3

Reorder the terms for easier multiplication:
fx = 4 * 10x * x3

Multiply 4 * 10
fx = 40x * x3

Multiply x * x3
fx = 40x4

Solving
fx = 40x4

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 40x3

Simplifying
f = 40x3

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