God I f*ckin hate math

[pdiggitydogg]

So help me out...

I have these polynomials:
(8y^2-14y-15) (3y^2-7y-6)
------------------ *-------------
(6y^2-11y-10) (4y^2-9y-9)

Factored:
(-2y+5)(-4y-3) (-3y-2)(-y+3)
------------------*---------------
(3y+2)(2y-5) (4y+3)(y-3)

Now...I need to simplify it down.
So my question is:
Can I cancel out the (3y+2) and the (-3y-2) since the "-" changes the signs? Same for the other ones that change signs?
If that's right...doesnt everything cancel out???

[V8killimports]

Is the answer a vegetable?

[pdiggitydogg]

No, a kangaroo

[link]

:confused:
i wish i remembered how to do this stuff cuz im bored @ work and i would love to help... gimme a min and ill see what i can do...

[Racing Rice]

WTF... its 23. :D


Okay, its not really... Its harder then 4x4-6, I ain't gettin it. :paranoid:

[pdiggitydogg]

No no, it doesnt equal anything.
I just need to simplify it to basic components.

[GT40FIED]

Seriously...when the fuck in real life would you use something like that? I hate college.

[eXNBP]

Originally posted by pdiggitydogg
So help me out...

I have these polynomials:
(8y^2-14y-15) (3y^2-7y-6)
------------------ *-------------
(6y^2-11y-10) (4y^2-9y-9)

Factored:
(-2y+5)(-4y-3) (-3y-2)(-y+3)
------------------*---------------
(3y+2)(2y-5) (4y+3)(y-3)

Now...I need to simplify it down.
So my question is:
Can I cancel out the (3y+2) and the (-3y-2) since the "-" changes the signs? Same for the other ones that change signs?
If that's right...doesnt everything cancel out??? factor -1 out of (-3y-2) and you get (3y+2) :) it cancels that out then you can do the same for all of them and it'd factor to 1 i believe....

[ebpda9]

yeah, the answer is 1

[pdiggitydogg]

since all cancel?

[ebpda9]

yup

[Wren57]

I believe the answer would be -1... ?

[eXNBP]

Originally posted by highlander
I believe the answer would be -1... ? pretty sure everything cancels out to 1 :confused:

[Racing Rice]

Originally posted by GT40FIED
Seriously...when the fuck in real life would you use something like that? I hate college.

I know that I've been out of school for nearly 9 years, and I've never needed to know that.:o

[ChrisCantSkate]

Originally posted by eXNBP
pretty sure everything cancels out to 1 :confused:

yeah you end up with (-1)(-1)*(-1)(-1) which equals 1

[ShEaNy]

yea i think there right..its 1...

[ebpda9]

that was easy. i don't get the factoring part.

[pdiggitydogg]

Factoring is a bitch.
Tell me ONE person that actually does factoring in real life (other than math teachers and mathmaticians)

[MissJDM]

I agree with it being 1 and I verified it twice.
If you make the leading terms positives by taking +1 out of each of those negatives:
(-1)(2y-5)(-1)(4y+3)(-1)(3y+2)(-1)(y-3)
----------------------------------------------
(3y+2)(2y-5)(4y+3)(y-3)

Remove common terms:
(-1)(-1)(-1)(-1) = 1

Then if you check the answer with y=0

(8y^2-14y-15) (3y^2-7y-6)
------------------ * ----------------
(6y^2-11y-10) (4y^2-9y-9)



(-15) (-6) 90
------ * ------- = ---- = 1
(-10) (-9) 90

Double check it with y=1
(8y^2-14y-15) (3y^2-7y-6)
------------------ * ----------------
(6y^2-11y-10) (4y^2-9y-9)



(8-14-15) (3-7-6)
------------ * -----------
(6-11-10) (4-9-9)



(-21) (-10) 210
------ * ------- = ------ = 1
(-15) (-14) 210



I know my answer is a tad late, I haven't been getting to all of the boards lately. If you have other questions, feel send it my way. :)

[pdiggitydogg]

Oh there will probably be more later on...I suck at math and I have so much to do...

Oh yeah, and thanks for the help...it is 1

[FlooredAccord]

You guys are way too s-m-r-t, I mean s-m-a-r-t for me!:yes: