Question

What polynomial has roots of -1, -2, and 3 ?
Choose one answer.
a. x3 + 6x2 + 11x + 6
b. x3 - x2 - 5x + 2
c. x3 + 2x2 - 7x + 2
d. x3 - 7x - 6

Answer 1

the one that is what you get when you multitply
\[(x+1)(x+2)(x-3)\]

Answer 2

http://www.wolframalpha.com/input/?i=%28x%2B1%29%28x%2B2%29%28x-3%29

Answer 3

Have no clue which one that would be

Answer 4

clear right? put the polynomial in factored form, then multiply out

Answer 5

did you look at the link?

Answer 6

yess

Answer 7

"alternate form"

Answer 8

never mind got it lol

Answer 9

good

Answer 10

are you good at geometric sequences

Answer 11

go ahead and post, we can probably do it

Answer 12

What is the sum of the geometric sequence 1, -4, 16, ... if there are 7 terms?

Answer 13

well in this case it is probably easiest to just add since you only have 7 terms

Answer 14

I have tried I don't get one of the answers

Answer 15

\[1-4+16-64+256-1024+4096\]

Answer 16

I got the answer thanks so much!

Answer 17

i get 3277

Answer 18

yw