f(x)=4x^2+25

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Solution for f(x)=4x^2+25 equation: 


Simplifying
f(x) = 4x2 + 25

Multiply f * x
fx = 4x2 + 25

Reorder the terms:
fx = 25 + 4x2

Solving
fx = 25 + 4x2

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 25x-1 + 4x

Simplifying
f = 25x-1 + 4x

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