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\[y=\left(\frac{x^{2}+5-1}{x^{2}}\right)^{2} \]??

\[x^2+5-\frac{1}{x^2}\]

your step was wrong.. at first

why?

he's right....

well one minor mistake

what have i done wrong?

it is derivative of y = (x^2 + 5 - 1)^2 * (x^-2)

the derivative of x^(-2) is not -2x
it's -2x^-3

so just change your 2x there with 2x^-3 and you're fine. redo the rest of the solution

so you use if y = fg y' = f'g + fg'

lgbasallote, i get it, thanks!

try use chain rule to solve it

the eq is not a ratio..

damn..