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 all-the answer should be 11 but I don't have a clue how to get it-please show me this one so I can hopefully do my homeowrk-we 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 low-hanging 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

## Answer This Question

## Related Questions

- Algebra - Can someone show me step by step how to do this problem to have an ...
- college algebra--please - I am not understanding this question and I have read ...
- math - Can someone please help me with this word problem!?! I know the answer ...
- math - 2. Simplify. Please be sure to show all of your work. -3(-9) – |-5 – 3 3...
- Algebra 2 - I have no clue on this one. How would you solve: us the (IN) key to ...
- Math...Applying the Order of Operations - Can you please show me where i'm going...
- Algebra - Simplify this expression (DO NOT solve for x) 5x+6(x+2)-8(x-3) I have ...
- math ergent please... - 10.a)Solve the inequality x^3-5x^2+2x+8<0 by i) using...
- Intermediate Algebra - Solve using elimination method. If the system has no ...
- algebra - I NEED HELP SOLVING THIS PROBLEM ,PLEASE EXPLAIN AND SHOW HOW TO SOLVE...

More Related Questions