Question

-5x^3+7x^2-7x-1
let x=-2

Answer 1

i get to the last step and i guess im not doing my order of operations correct

Answer 2

-5(-2)^3+7(-2)²-7(-2)-1
-5(-8)+28+14-1
40+29+13
69+13
82

Answer 3

its not 81?

Answer 4

it would be 81

Answer 5

im lost lol

Answer 6

it is 81
Arkie went from 28 in line two to 29 in line 3 by acciedent.

Answer 7

yea i see that, i can get to the very last step on these and then I get them wrong.

Answer 8

yeah, i'm so
rry

Answer 9

my bad

Answer 10

its ok, i make simple mistakes all the time, thats why i cant get these lol

Answer 11

i have one more also..-3x^3+7x^2-8x-2 let x=-1

Answer 12

-3(-1) + 7(1) - 8(-1) - 2
3 + 7 + 8 - 2
16

Answer 13

aaahh see i got that correct! dont ask me how lol

Answer 14

just answer couple of questions relating to this problem sorta so you will no be confused...

Answer 15

i have 3 left to check before i turn it in, making sure they are correct thanks for the help.

Answer 16

thats what we do here at openstudy :D