Question

Divide (x^3+2x-5)÷(x-3)

Answer 1

(x^3+3x+11)+28/x-3

Answer 2

how did you get there?

Answer 3

magic

Answer 4

-.-' I accept the joke but lets be real

Answer 5

and i used synthetic division

Answer 6

i get x^2 + 3x + 8 + 19/x-3

Answer 7

how did you get that

Answer 8

long division of polynomials

Answer 9

is that the same as synthetic division

Answer 10

yes

Answer 11

then i have no idea what happened and why we got different answers

Answer 12

ok ok ppl don't argue go step by step

Answer 13

and prguan I guess your magic just doesn't work

Answer 14

alekos did the same method so "magic" does work

Answer 15

http://img1.wikia.nocookie.net/__cb20110606042636/es.futurama/images/c/c6/Futurama_fry_looking_squint2.jpg

Answer 16

seriously though help me solve this you two
because you know karma

Answer 17

:)

Answer 18

sorry. the correct answer is x^2 +3x + 11 + 28/x-3

I'll show you how its done

Answer 19

so i was right the first time

Answer 20

THANK YOU! @alekos

Answer 21

wow

Answer 22

you said it not me

Answer 23

yeah yeah so step by step @alekos? :)

Answer 24

x^2
_____________________
x-3 )x^3 + 0x^2 + 2x -5
x^3 - 3x^2

Answer 25

are you familiar with the long division of polynomials?

Answer 26

thank you very much!

Answer 27

by the way prguan you were very close but you had x^3 instead of x^2 as the first term

Answer 28

nope I'm starting on the lesson so we have to solve the "preview questions" ourselves

Answer 29

3 + 2x - 5
x - 3

Determine our root divisor:
To find our root, we solve the divisor equation x - 3 = 0
We add 3 to each side of the equation to get x - 3 + 3 = 0 + 3
Therefore, our root becomes x = 3

Step 1: Write down our coefficients horizontally and our root of 3 to the left:

1 0 2 -5
3



Step 2: Bring down the first coefficient of 1

1 0 2 -5
3 ↓
1


Step 3: Multiply our root of 3 by our last result of 1 to get 3 and put that in column 2:

1 0 2 -5
3 3
1


Step 4: Add the new entry of 3 to our coefficient of 0 to get 3 and put this in the answer column 2:

1 0 2 -5
3 3
1 3


Step 5: Multiply our root of 3 by our last result of 3 to get 9 and put that in column 3:

1 0 2 -5
3 3 9
1 3


Step 6: Add the new entry of 9 to our coefficient of 2 to get 11 and put this in the answer column 3:

1 0 2 -5
3 3 9
1 3 11


Step 7: Multiply our root of 3 by our last result of 11 to get 33 and put that in column 4:

1 0 2 -5
3 3 9 33
1 3 11


Step 8: Add the new entry of 33 to our coefficient of -5 to get 28 and put this in the answer column 4:

1 0 2 -5
3 3 9 33
1 3 11 28


Our synthetic division is complete. The values in our results row form a new equation, which has a degree 1 less than our original equation shown below:
Leading Answer Term = x(3 - 1) = x2

Since the last number in our result line of 28 does not equal 0, our answer will have a remainder. We take this term and divide it by our (x - r) root which is x - 3 shown below in our answer:

Answer =

x2 + 3x + 11 +28
__
x - 3

Answer 30

HE HAD THE RIGHT ANSWER TOO

Answer 31

i screwed up the first time

Answer 32

now i just proved to you that "magic" works
:)

Answer 33

nvm chill no need to caplock