## anonymous one year ago multiply. x-5/4x-8 times (12x^2+32x+16)

1. anonymous

|dw:1433126245822:dw|

2. Nnesha

3. Nnesha

do you now how to factor quadratic equations ?

4. anonymous

not really, i know that you know how to break it up though..

5. Nnesha

first of all find GCF( greatest common factor ) $\huge\rm 12x^2 +32x +16$

6. anonymous

4?

7. Nnesha

yep right take it out $4( ???)$ what should be in the parentheses

8. anonymous

what do i put in the parentheses?.. do i divide them all by 4?

9. anonymous

im sorry im horrible at math..

10. Nnesha

yep! that's right

11. Nnesha

nah u r fine! :-)

12. anonymous

okay... so i got (3*4) for 12 (2*2*2*2*2) 2x^5 for 32.. and (2*2*2*2)) 2x^4 for 16.. is that right?

13. Nnesha

you can do like this $\huge\rm \frac{12x^2 }{4} +\frac{32x}{4} +\frac{16}{4}$ 4( ) write your answer

14. anonymous

okay, and we use 4 because its the gcf?... so i got 3x^2+8x+4

15. Nnesha

yep right now find two number if you multiply them you should get product of AC and if you add or subtract them you should get middle term which is 8 |dw:1433127528801:dw|

16. anonymous

oh okay

17. anonymous

so these are my answer choices.. - (3x+2)/4(x-5) -(x-5)(3x+2)/4 -(x+5)(3x+2) -(x-5)(12x+8)

18. anonymous

i think its gonna be the first one?..

19. Nnesha

what are factors of 3x^2 +8x +4 ?

20. anonymous

im not sure.. i know i can still factor 8x and 4 by 4 or 2 but idk for 3x^2...

21. Nnesha

what is a= and c in that equation |dw:1433128106396:dw|

22. anonymous

a= 3x^2 and c is 4 right?

23. rissyroo118

x-5/4x-8 x- 5/4x-8m= -1/4x-8

24. anonymous

im done with this question lol.. but that wasnt one of the answer choices.. but ugh im just gonna guess

25. rissyroo118

x-5/4x-8*(12x^2+32x+16) = -1/4x-8x

26. rissyroo118

(12x^2+32x+16)=-1/4x-(8x12^2=8x32x+8*16)

27. rissyroo118

=-1/4x-(96x^2+256x+128)=-96x^2-2561/4x-128

28. anonymous

okay, thanks! you needed help with your bio right?

29. anonymous

biology is my thing, not algebra D:

30. Nnesha

sorry i lost net connection yesterday :D sorry :( so

31. Nnesha

sorry i lost net connection yesterday :D sorry :( let me konw if you still need help :-)

32. anonymous

haha thanks but i figured it out :)

33. Nnesha

alright

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