I finished this problem only to find that the signs have changed and I am not sure why. Can someone please let me in on the secret?

Attachment 27654

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- March 22nd 2013, 02:55 PMthatsmessedupis this right?
I finished this problem only to find that the signs have changed and I am not sure why. Can someone please let me in on the secret?

Attachment 27654 - March 22nd 2013, 03:18 PMMacstersUndeadRe: is this right?
No secret. The negative sign was factored out of the term and placed in front of the entire fraction in the last line.

- March 22nd 2013, 03:22 PMthatsmessedupRe: is this right?
ahhaa I actually didn't notice that negative sign at the beginning. I get it now... (a)(b)(-c) is the same at -(a)(b)(c) Thanks!