f(x)=x^2cos(5x)

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Solution for f(x)=x^2cos(5x) equation: 


Simplifying
f(x) = x2cos(5x)

Multiply f * x
fx = x2cos(5x)

Remove parenthesis around (5x)
fx = cosx2 * 5x

Reorder the terms for easier multiplication:
fx = 5cosx2 * x

Multiply cosx2 * x
fx = 5cosx3

Solving
fx = 5cosx3

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 5cosx2

Simplifying
f = 5cosx2

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