Solve for f
f=\frac{7\left(x^{4}-8\right)}{x}
x\neq 0
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fx=7x^{4}-56\frac{\mathrm{d}}{\mathrm{d}x}(x)
Multiply -1 and 56 to get -56.
xf=7x^{4}-56
The equation is in standard form.
\frac{xf}{x}=\frac{7x^{4}-56}{x}
Divide both sides by x.
f=\frac{7x^{4}-56}{x}
Dividing by x undoes the multiplication by x.
f=\frac{7\left(x^{4}-8\right)}{x}
Divide 7x^{4}-56 by x.
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