Getting Partial Fraction Decomposition Wrong

Question

So I have done this solution: Wrong Partial Fraction Decomposition

But it's wrong according to technology. I fail to see any error I've made in this solution, do you guys have any idea what's wrong?

In the line starting with $0s^3$, you didn't distribute $As^2(s + 1)$ and $Bs(s + 1)$ properly - instead of $A$ and $B$, you want $As^2$ and $Bs$ — pjs36, May 21 '15 at 21:20

score 4 · Accepted Answer · answered May 21 '15 at 21:19

4

In your fourth line you have, $As^3 +A$ and $Bs^2 + B$ but you should have $As^3 +As^2$ and $Bs^2 + Bs$

answered May 21 '15 at 21:19

user222031

This is the correct answer. Thank you, I'm the king of algebra mistakes. I'll mark it when this website lets me. – KlingL May 21 '15 at 21:28

score 1 · Answer 2 · answered May 21 '15 at 21:19

1

4th equal sign. You did not distribute the $s^2$ and so on. It should have been

$$As^3+As^2...$$

answered May 21 '15 at 21:19

Gappy Hilmore

2 Answers2