How about helping me see the process of factoring -2x^3 - 12x^2 + 30x + 200? Thanks.

Question

How about helping me see the process of factoring -2x^3 - 12x^2 + 30x + 200?  Thanks.

bahrom7893 · Answer

I would first take the 2 out:
2(-x^3 - 6x^2 + 15x + 100)

bahrom7893 · Answer

Now, Im lost lol... havent factored by hand in a while... let me see..

bahrom7893 · Answer

im in diff eqns, we barely factor by hand

bahrom7893 · Answer

actually take -2 out..

anonymous · Answer

Did that...now what?

bahrom7893 · Answer

i think i see a (x+5)^2 somewhere, but not sure yet..

anonymous · Answer

yes...that's part of the answer but how do you know that?

bahrom7893 · Answer

just doin trial and error, let me figure it out lol..

bahrom7893 · Answer

If I am right then we need to find an x^2+10x+25 in there..

anonymous · Answer

You are right...the other part of the answer is an (x - 4)...can't see it.

bahrom7893 · Answer

wait lemme google how to do this, refresh my memory..

bahrom7893 · Answer

omg i just realized how much i hate cubics... forgot how i got the x+5...

anonymous · Answer

me too

bahrom7893 · Answer

wait i think i can check somewhere..

bahrom7893 · Answer

aww wolframalpha is not showing steps..=( when is this due?

anonymous · Answer

Factor by grouping!

bahrom7893 · Answer

okay ive tried gorupin every danged term..

anonymous · Answer

Oh, then never mind. That was just a wild guess.

bahrom7893 · Answer

oh lol, i thought i was goin crazy..

anonymous · Answer

I'm a teacher...was going to teach it tomorrow...but I can wait.

anonymous · Answer

I've been trying to figure it out all day.

bahrom7893 · Answer

LOL really? WOW I am stuck at a similar one for my diff eqns class, gotta solve a cubic equation, even calculator is not helpin..