f(x)=1x^2-21

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Solution for f(x)=1x^2-21 equation: 


Simplifying
f(x) = 1x2 + -21

Multiply f * x
fx = 1x2 + -21

Reorder the terms:
fx = -21 + 1x2

Solving
fx = -21 + 1x2

Solving for variable 'f'.

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

Divide each side by 'x'.
f = -21x-1 + x

Simplifying
f = -21x-1 + x

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