Got confused by this limit at infinity problem I do know that the answer is -9/2 though I don't get much on how to get that answer I know how to do it with fractions though.
so lim x -> +infinity (sqrt(x^4-9x^2)-x^2)

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\[\lim_{x \rightarrow +\infty} (\sqrt[4]{x^4-9x^2} - x^2)\] better visual lol

i got \[\frac{ -9x^2}{ \sqrt[4]{x^4-9x^2}+x^2 } \] i am going the right way? XD

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