limits (what's wrong with my solution???)

[smoky walrus]

This is the answer i got.. while the calculator's -1-√2

[uneven portal]

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[prime ember]

imdeadinside4630

[smoky walrus]

nop

[cold heart]

The mistake is on the second column step 2 from the top

The 2 on the very bottom is supposed to be $\sqrt{2}$

[smoky walrus]

ohh yep the sqrt

[prime ember]

TheVinkler

[cold heart]

Ye

very subtle