Find the limit of x^2-4/x^3+8 as x approaches -2 ? (best answer medal,and Fan)

Question

anonymous · Answer

why don't you just plug -2 into the equation? you shouldn't get a nonreal answer

anonymous · Answer

i tried that but i guess i prob made a stupid mistake ill do it again

anonymous · Answer

you should get -1.22070313^-4 which is basically zero.  What is the answer in the back of the book?

anonymous · Answer

oh i remember what i didn't understand it i got zero every time

anonymous · Answer

so zero is right

anonymous · Answer

back of what book ?

anonymous · Answer

where are you getting this question from?

anonymous · Answer

surely it's a homework problem?

anonymous · Answer

im taking calc online,no book :(

anonymous · Answer

oh so they don't have answers?  that blows. generally they have answers so you can compare your answer to theirs and see if you got it right.

anonymous · Answer

Directly substituting -2 would be giving 0/0 form...
Do it like, |dw:1361006704976:dw|
You can now substitute x=-2 in here as there is no indeterminate form...