Given the binomials (x + 1), (x + 4), (x - 5), and (x - 2), which one is a factor of f(x) = 3x3 - 12x2 - 4x - 55?

(x + 1)

(x + 4)

(x - 5)

(x - 2)

Question

Given the binomials (x + 1), (x + 4), (x - 5), and (x - 2), which one is a factor of f(x) = 3x3 - 12x2 - 4x - 55?

 (x + 1)

 (x + 4)

 (x - 5)

 (x - 2)

anonymous · Answer

peopleee please help mee.

usukidoll · Answer

I'm thinking about it. It's been a while since I last had a problem like this... my guesses would be to factor by grouping or you need to divide using long division... sorry about that.

anonymous · Answer

It's fine. Thank you :)

nincompoop · Answer

x-5 is a good candidate

math&ing001 · Answer

Plug in the values -1 , -4 , 5 , 2  in f(x) and which ever gives 0 is a factor of f(x)

anonymous · Answer

So it's x-5?

usukidoll · Answer

ah yes now I remember..... @math&ing001 that's like finding the 0's

usukidoll · Answer

or real .. something.. dang

math&ing001 · Answer

@UsukiDoll exactly !

nincompoop · Answer

rational roots @UsukiDoll

anonymous · Answer

it's (x-5) would you like me how to show you how I worked it out?

anonymous · Answer

Nope that's alright! Thank you all for your help :)

nincompoop · Answer

I bet you she did not understand a thing about the concept and will surely ask the same conceptual problem again

anonymous · Answer

Ok, no problem. Happy studying :)

usukidoll · Answer

not so used that much algebra ii material..

nincompoop · Answer

https://www.youtube.com/watch?v=RXKfaQemtII