## countonme123 Group Title Please help: Dividing Polynomials Stay tuned will draw it. 2 years ago 2 years ago

1. countonme123 Group Title

|dw:1336152715827:dw|

2. eSpeX Group Title

Like normal division, what would you need to multiply (r+2) by to get close to (r^6+0r-64)?

3. countonme123 Group Title

idk i dont know how can you explain

4. eSpeX Group Title

If I gave you this:|dw:1336153681989:dw| How would you go about solving it?

5. eSpeX Group Title

You would say, "what is the largest number I can multiply 6 by to get the first number?" Since 6 is greater than 4 you would ask the question again about 42. The same logic applies to your problem... What do I need to multiply 'r' by to get r^6?|dw:1336153892815:dw|

6. eSpeX Group Title

Make sense?

7. eliassaab Group Title

$r^6-64=(r-2) (r+2) \left(r^2-2 r+4\right) \left(r^2+2 r+4\right)$ You can also factor before if it is permitted. Division will be easy by r+2

8. eSpeX Group Title

Not even sure if basic division makes sense at this point. :p

9. amistre64 Group Title

to be fair, 6 *n = 4 when n=4/6 :)

10. amistre64 Group Title

|dw:1336178970658:dw|

11. amistre64 Group Title

notice that when we want to zero out the first term; we multiply by that term divded by the one on the outside same pattern applies to polys

12. countonme123 Group Title

ok but i get the positive and negatives mixed up

13. amistre64 Group Title

|dw:1336179161444:dw|

14. amistre64 Group Title

i get positives and negatives mixed up to, which is why i always have to dbl or trpl chk my outcomes

15. amistre64 Group Title

the key being, the top is just the division of the first terms each time till you decide to stop

16. amistre64 Group Title

usually you simplfy the top as you go tho and wouldnt leave it in that structure

17. countonme123 Group Title

hmmm

18. amistre64 Group Title

its no different form what they taught you back in the 3rd or 4th grade :) you just gotta practice it to get more confident at it, but theres nothing new to it overall

19. countonme123 Group Title

i wish it was like that for me but i get the numbers right just wrong signs :(

20. amistre64 Group Title

wrong signs tend to be a result of forgeting that you are subtracting everything; just like normal: 8 -------- 4 ) 34 8(4) = 32 do we add or subtract the 32 to get the next line?

21. countonme123 Group Title

subtract i believe

22. amistre64 Group Title

correct, and its the same basic concept when using polys to; division is division no matter what you use

23. countonme123 Group Title

o k