## anonymous one year ago SIMPLIFY (8x+7x)(4x^3-5x^2-6x+1)

1. anonymous

I got this!

2. anonymous

okay

3. anonymous

I got this lol

4. anonymous

Bro....I got this!

5. anonymous

9x(4x^3-5x^2)+1.....I believe this is it. Let me check again.

6. anonymous

I think i got it

7. anonymous

@BlooooooBlahBLIIIIK what did you get?

8. anonymous

my brain?

9. anonymous

10. anonymous

wait 9x(4x^3-5x^2)+1?

11. anonymous

hold on

12. anonymous

That's what I got...you can't combined anymore like terms.

13. anonymous

@coffee789 What did you come up with?

14. anonymous

Yeah

15. Nnesha

9x where is it come from ?

16. anonymous

60x^4-75x^3-90x^2+15x

17. anonymous

thas wat i got

18. Nnesha

@coffee789 are you sure it's (8x+7x) >???

19. anonymous

@Nnesha thats what im trying to figure out

20. anonymous

yes im sure

21. anonymous

8x+7x=15x

22. Nnesha

alright then first combine like terms 8x+7x= ?

23. anonymous

yea and you get 15x

24. anonymous

wouldnt it be 15x(4x3−5x2−6x+1)

25. anonymous

Then you subtract -6x from 15x

26. anonymous

That's how you get 9x

27. Nnesha

|dw:1442333350297:dw| multiply all terms by 15xx

28. Nnesha

15x***

29. anonymous

Well i got 15x(4x3−5x2−6x+1) idk

30. Nnesha

@coffee789 multiply all these terms 4x^3-5x^2 -6x+1 by 15x |dw:1442333445816:dw|

31. Nnesha

15x times 4x^3 = ??

32. anonymous

60x4

33. anonymous

?

34. Nnesha

multiply the coefficient and add exponents of variables$\huge\rm 15x^1 ·4x^3=(15 · 4)x^{1+3}$ when we multiply same variables we should add their exponents x is same as x to the 1 power

35. Nnesha

plz let him solve it

36. anonymous

Oh sorry

37. anonymous

okay so i got 60x^4

38. anonymous

is that right

39. anonymous

yes

40. Nnesha

yeah.... right now multiply 15x by 2nd term |dw:1442333740672:dw|

41. Nnesha

15x times -5x^2 = ?

42. anonymous

-75x^3

43. anonymous

Not negative

44. anonymous

why not

45. anonymous

I mean yes Lol

46. Nnesha

that's right |dw:1442334024818:dw| now multiply 15x by -6x and then by -1

47. Nnesha

+1**

48. anonymous

15x +1

49. Nnesha

well 15x times 1=15x but what about -6x 15x tims -6x=?

50. anonymous

-90x

51. anonymous

Correct

52. anonymous

forgot the 2

53. anonymous

−90x2

54. Nnesha

well nope 15x times -6x= ?? remember x is same as x^1 so add their exponents

55. Nnesha

when we multiply same bases we should add their exponents $\huge\rm x^1 ·x^1 =x^{1+1}$

56. anonymous

oh so it's -90x^2

57. Nnesha

yes right

58. Nnesha

that's it done!

59. anonymous

yayy

60. anonymous

Yup

61. Nnesha

Yahoo!! o^_^o

62. anonymous

thanks for all of your help

63. Nnesha

yw :=)