Question

Find the remainder when f(x) is divided by g(x), without using long division.
f(x) = x4 - 2
g(x) = x + 2

Answer 1

Why is the answer to this NOT -18?

Answer 2

thats x^4 by the way

Answer 3

the answer is x^3-2x^2+4x-8+14/x+2 if my work is correct.

Answer 4

i used synthetic division

Answer 5

the remainder would be that last part.. 14/x+2

Answer 6

that doesnt seem right to me

Answer 7

wheres the confusion

Answer 8

today in class my teacher told us that we can just plug in the opposite of what the bottom is... so -2. when i do that i get -18.

Answer 9

idk... she confuses me.

Answer 10

if you know how to use synthetic division, then this should be easy. the part on the left would be (x-k) or x-2 in your case. on the right would be x^4+0x^3+0x^2+0x-2

Answer 11

its a formula you gotta plug in for synthetic division

Answer 12

you see g(x) is x+2 so your left side is gunna be -2

Answer 13

because (x-(-2) = x+2

Answer 14

(x-k) is the formula whereas you put k on the left side of your division box thingy

Answer 15

you're doing wrong man... but thanks.

Answer 16

no man that's right.

Answer 17

my hw website doesnt think so lol

Answer 18

whats the answer on the website

Answer 19

its not multiple choice. i just put it in and it tells me if im wrong or right. i have multiple tries though so i can keep trying.

Answer 20

ok the answer is 14/x+2 is the remainder.. no doubt.. try putting 14

Answer 21

ok it is 14

Answer 22

:D

Answer 23

damn you had me trippin

Answer 24

lol im always trippin when it comes to math

Answer 25

trust me, i layed off the kush soon as i graduated highschool and realized engineering isnt easy

Answer 26

im majoring in marketing which requires a lot of math :(

Answer 27

but u gotta do what u gotta do