Here's the question you clicked on:
osanseviero
Limit of a function without graphics. Algebraic way :)
\[\lim_{x \rightarrow -3}\frac{ x ^{3}+x ^{2}-21x-45 }{ x ^{3}+7x ^{2}+15x+9 }\]
I think you just plug in 3 for x
Nope, it is an idetermination. If you plug in, it is 0/0
Ok, since the numerator and the denominator has the same degree of 3 wouldn't the limit just be 1 then?
Nope, there are ways in which you factorize...the thing is that I dont know how to factorize this function
Factor out the numerator and denominator.
Just got it, thanks :)
and simplify what you can in the numerator and denominator , and then plug in your x value