Question

HELP PLEASEEEEEEEEEEEEE
Multiply. (2n^2+5n+4)(2n-4)

Answer 1

2n^3 -8n^2 + 10n^2 -12n-16

Answer 2

that isnt in my choices ...

Answer 3

lol

Answer 4

:( @Luis_Rivera , caan you help with this ?

Answer 5

Multiply everything in the big parentesi by 2n, then by -4, and finally combine like terms

Answer 6

4n3 – 2n2 + 28n – 16
4n3 + 12n2 – 2n – 16
4n3 + 2n2 – 12n – 16
4n3 + 18n2 – 28n – 16
; out of these, would D , be right ?

Answer 7

@mathslover , help ?

Answer 8

@smokeydabear

Answer 9

No @adl_thoo

Answer 10

UGHHHHHHHHH -_-

Answer 11

Try it again.

Answer 12

im trying.

Answer 13

@Luis_Rivera has guided very nicely. Have you followed the steps given by Luis?

Answer 14

You multiply each term by each term:

(2n^2+5n+4)(2n-4)
2n(2n^2+5n+4)-4(2n^2+5n+4)

Does that make it any easier? I don't want to do the whole problem for you.

Answer 15

Nicely done @smokeydabear . Good to see.

Answer 16

yes, i will try that.

Answer 17

but see, when i do these steps, nothing matches my answer choices.

Answer 18

Show me your work, I'll try to find the mistake.

Answer 19

2n(2n^2+5n+4) = i get : 4n^3 + 5n + 4 ?

Answer 20

*10n

Answer 21

4 should not be there, you forgot to multiply it by the 2n.

Answer 22

so would it be 8n ? o.O

Answer 23

Yep, now do the other half.

Answer 24

(2n-4) ; would be ? 4n - 8n ?

Answer 25

Nooo, we split that up already remember? Start from where I left off above.

Answer 26

-4(2n^2+5n+4) ; so youd multiplt the ()'s by -4?

Answer 27

Yes, so what is that?

Answer 28

-8n^2 + (-20n) + (- 8)

Answer 29

Yepp, now combine like terms from that half and the other half.

Answer 30

4n^3 + 10n + 8n + -8n^2 + (-20n) + (- 8) = it'd be : 4n^3 + 18n^2 -28n -16 ?

Answer 31

Where did you get the 18n^2 from? It should just be -8n^2. It looks like you mixed up a lot of things here, make sure you do it one at a time.

Answer 32

If it helps, try separating all the terms out visually too.

Answer 33

:( i give up , thanks anyways.

Answer 34

Do you need me to walk you through it?

Answer 35

No, don't you dare give up >:0

Answer 36

it probably isnt going to help . i tried to understand it. i got a few paarts only.

Answer 37

answer is 40 n^3 (2 n-4)

Answer 38

no it isnt.

Answer 39

Okay let me help some more:

4n^3 + 10n + 8n + -8n^2 + (-20n) + (- 8)
After grouping the like terms...
4n^3+(-8n^2)+(10n+8n-20n)+(-8)

Now can you do it?

Answer 40

4n^3 ik thats the first part..

Answer 41

& the end should be - 16 .. i cant figure out the middle

Answer 42

may be correct, im not sure ?

Answer 43

@thefoe1990 You shouldn't be giving out answers, we need to teach people rather than give answers.

Answer 44

Truee !! -_- i need to learn this .

Answer 45

What is stumping you exactly? And don't say "everything", because we got this far.

Answer 46

lol , the inside part is getting me. im confused with my like terms on the inside. i figured out 4n^3 at the first & -16 for the end.

Answer 47

Tell me how you're getting the -16.

Answer 48

tried to sleep..........

Answer 49

Actually, all the answers include it, hold on lemme double-check work

Answer 50

idk ? i seen a -8 & -8 , which made a -16

Answer 51

Sorry that's my bad. Forget what I said...

Answer 52

its fine.

Answer 53

Ohhhh, you multiplied wrong when we did the -4 earlier.

Answer 54

ohh , im sorry :(

Answer 55

-8n^2-20n-16 should have been the second half.

Answer 56

ohh , i see , i see .. sorry /:

Answer 57

My fault as well for not spotting it. Tis why I'm a bad teacher, I make too many mistakes.

Answer 58

Why Ralph, why...

Answer 59

lmaoo, shes trying to teaach me /:

Answer 60

What Smoky, what............

Answer 61

oh, did I mess something up?

Answer 62

I'm trying to teach her this, not just give out an answer.

Answer 63

haha, you gave the answer dear..

Answer 64

I mean you technically explained it too, but it looks scary on its own.

Answer 65

its okay ralph. & ikr :(

Answer 66

@smokeydabear I didn't know I was to go elementary in my explanation..

Answer 67

Okay so anyway, now combine the two halves again, using the new right half.

Answer 68

@primeralph Sometimes you have to, not everyone gets it instantly.

Answer 69

-_- i cant help im dumb :(

Answer 70

now I look like the villain. Imma just go back to bed....
Good night.

Answer 71

lmao, no you are not dear.

Answer 72

You can do it, let me pull all the numbers back together, I lost em xD

4n^3 + 5n^2 + 4 + -8n^2 - 20n - 16

Answer 73

Do you understand everything up to that point?

Answer 74

yes . i do .

Answer 75

4n^3 + 10n^2 + 4 + -8n^2 - 20n - 16

Answer 76

I meant to write that

Answer 77

lol , i know .

Answer 78

Okay so just pair up all the like terms like I did before.

Answer 79

:o its 1:32 ? :O WOAH & im doing algebra? shame .. lol

Answer 80

okay, so ill put all my like terms together.

Answer 81

I hope you get it. Good luck.

Answer 82

thanks ralp:D

Answer 83

*ralph

Answer 84

welll, i guess ill go to bed /: THANKSSSS LOVESS FOR THE HELP !! i finally understand this problem <3 <3

Answer 85

Oh you do? I need to make sure before you get off that easily =P

Answer 86

haha , okay .

Answer 87

try this: