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Polynomial

Hi, can someone help me divide this polynomial

x3 + 0x2 - 3x - 2 divided by x - 2

Thanks
Original post by windmaster21
Hi, can someone help me divide this polynomial

x3 + 0x2 - 3x - 2 divided by x - 2

Thanks


Long division.
Reply 2
Original post by RDKGames
Long division.


Yep, i did that but im having trouble being able to work out the difference between 0x2 and -2x2 :frown:
Original post by windmaster21
Yep, i did that but im having trouble being able to work out the difference between 0x2 and -2x2 :frown:


0-(-2)=2
Reply 4
Original post by RDKGames
0-(-2)=2


In the c2 book, it comes out as (x3+0x2) - (x3-2x2)
wouldnt that then be x3+0x2 - x3 +2x2= 3x2

But it comes out as 2x2 in the book
Original post by windmaster21
In the c2 book, it comes out as (x3+0x2) - (x3-2x2)
wouldnt that then be x3+0x2 - x3 +2x2= 3x2

But it comes out as 2x2 in the book


I got 0 - (- 2) after first step,
(edited 7 years ago)
Original post by windmaster21
In the c2 book, it comes out as (x3+0x2) - (x3-2x2)
wouldnt that then be x3+0x2 - x3 +2x2= 3x2

But it comes out as 2x2 in the book


No because you have x3x^3 which cancels and then for x2x^2 coefficients you have 0x2+2x2=(0+2)x2=2x23x20x^2+2x^2=(0+2)x^2=2x^2 \neq 3x^2
Reply 7
Original post by Muttley79
I got 0 - (- 2) after first step,


Why does the book work it out differently? instead of doing 0 - ( -2) it multiplies (x3+0x2) - (x3-2x2) to equal = 2x2, which doesnt seem to ring true :frown:
Original post by windmaster21
Why does the book work it out differently? instead of doing 0 - ( -2) it multiplies (x3+0x2) - (x3-2x2) to equal = 2x2, which doesnt seem to ring true :frown:


See RDKGame's post above.
Reply 9
Original post by RDKGames
No because you have x3x^3 which cancels and then for x2x^2 coefficients you have 0x2+2x2=(0+2)x2=2x23x20x^2+2x^2=(0+2)x^2=2x^2 \neq 3x^2


Original post by Muttley79
See RDKGame's post above.


Thank you both :smile:

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