Posted by Jeremy on Wednesday, March 7, 2012 at 5:51pm.
Help please
(x^3 + 3x^2  2x+7)/(x+1)=11
I don't how how to solve this at allthe answer should be 11 but I don't have a clue how to get itplease show me this one so I can hopefully do my homeowrkwe did this in class today but I don't understand it

Algebra  Steve, Wednesday, March 7, 2012 at 7:32pm
well, disallowing x = 1 because that would cause division by zero, just solve
x^3 + 3x^2  2x + 7 = 11x + 11
x^3 + 3x^2  13x  4 = 0
cubics aren't easy to solve in general, so look first for lowhanging fruit: +/ 1,2,4
Hmm. No joy there. Some iterative method, or wolframalpha will provide the three real roots:
5.3, 0.3, 2.6
If the answer is 11, there's a typo somewhere in the problem. f(11) = 139.9