Question

Factor the following completely:

15x^3 − 87x^2 − 264x

GCF: x
Factors I got are:
15: 3*5
264:?

Answer 1

@Rose6 @tHe_FiZiCx99

Answer 2

Not quite, there's a coefficient gcf! Keep looking :)

Answer 3

lol, oh no! uhh, 3!

Answer 4

Yes

Factor a 3x out of the trinomial

Answer 5

3x(5x^2-29x-88)

Answer 6

15x^3 − 87x^2 − 264x

3x(5x^2 -29x - 88)

Now, multiply 5 * -88, what do you get?

Answer 7

-440

Answer 8

Yes, now what adds up to -29 that equals -440 when multiplied?

Answer 9

Hint: one has to negative, the other has to be positive

Answer 10

Idea?

Answer 11

What is that? @david111
& nope. @tHe_FiZiCx99

Answer 12

I don't think I need that.

Answer 13

Ok, -40 * 11 = -440

-40 + 11 = -29 <-- this is your middle term

3x(5x^2 -40x + 11x - 88)

Now factor that out!

Answer 14

Ok, now I'm lost...I'm too sleepy to concentrate lol

Answer 15

factor 5x^2 - 40x + 11x - 88

Answer 16

@david111 stop posting irrelevant replies on this thread. And refrain from giving out answers.

Answer 17

@AccessDenied @AravindG

Answer 18

Oh goodness...calling backup lol

Answer 19

Why did you delete your replies? They can still see them.

Anyway, Cookii, did you factor it out yet?

Answer 20

Lol, he can see them...

Answer 21

I did but I lost it...he distracted me lol

Answer 22

Do it again :D I gtg soon >.<

Answer 23

He won't cause trouble anymore. Continue your learning :)

Answer 24

:O

;)

Answer 25

Thank you.

Answer 26

What did you get :o

Answer 27

Why can't people get IP banned, some don't even contribute to Openstudy. Like that ^

Answer 28

(5x...that's all I remember

Answer 29

Hmm, let's try that again cookii :>

5x^2 - 40x + 11x - 88

5x^2 and -40x have what gcf in common?

Answer 30

I just know the 3x goes in front of everything

Answer 31

5x^2 and -40x have what gcf in common?

Answer 32

x?

Answer 33

-40/5 = ? *

Answer 34

I was gonna say -8 but I was unsure & lost lol

Answer 35

5x^2 - 40x have not only an x in common but a 5!

5x^2 - 40x --> 5x(x - 8), not the neat thing is that when you factor the other part it HAS to give you (x-8) in order to work

Answer 36

it does , 88/11=8

Answer 37

It feels nice having @AravindG watching over us lol

Answer 38

Nerp, -88/11 = -8!

So, 11x - 88 --> 11(x - 8)

Now simply put (x-8)(5x + 11)

That's it, now add the 3x outside

3x[(x-8)(5x+11)] and that's it!

Answer 39

Yes it does ;)

Answer 40

My name is Optimus Prime. We are Autonomous Robotic Organisms from the planet Cybertron. I am here to protect your planet :)

Answer 41

Sorry if I didn't explain to well, I was multitasking and doing my own homework :( Hopefully you understood it :P I gtg

Answer 42

And I've watched that movie 4 times this week .-. >.> cx

Answer 43

Dat feels >.>

Answer 44

Cx

Answer 45

lmaooo I love OP & Bumblebee !! <3

Answer 46

haha cool ..I am waiting for the 4th movie.

Answer 47

Same ;) Well, night Avar, Cookii!

Answer 48

X_X Arav * ;-;

Answer 49

Bye :) Good night!

Answer 50

Gn :>

Answer 51

I met them at Universal Studios before lol I love living in Cali lol
Goodnight ! ^_^

Answer 52

That's so cool. I wish I could be there :O

Answer 53

lol it was people in the costumes, but they were like 7 or 8 feet tall...they were beautiful ! lol