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## DF001 one year ago Need help with an Algebra question please.

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1. madhu.mukherjee.946

say

2. DF001

$\left( 4m ^{2} n\right)(-m ^{6}n ^{-3})$

3. DF001

I was never taught in class about this but, it is on the homework

4. DF001

how can i apply the properties of integer exponents onto this

5. midhun.madhu1987

|dw:1441170971695:dw|

6. madhu.mukherjee.946

-4m^8n^-2

7. DF001

Why did the 4 become negative?

8. madhu.mukherjee.946

becoz there a -ve sign with the m

9. midhun.madhu1987

a * (-b) = - a*b

10. midhun.madhu1987

2 * (-3) = -(2*3) = -6

11. madhu.mukherjee.946

|dw:1441171141122:dw|

12. DF001

Did the 4 distribute to the -1 on m?

13. madhu.mukherjee.946

4 is becoming negative as there is a -1with the m^6,which is hidden

14. madhu.mukherjee.946

yes 4*-1 will give you -4

15. DF001

Is it possible to do this question by distributing and foiling?

16. DF001

i havent learn this yet i want to keep it easy

17. madhu.mukherjee.946

i don't know that but its quite simple if you do this in this way

18. madhu.mukherjee.946

see whenever bases are same the powers are added

19. madhu.mukherjee.946

for example- -3a*6a^7 =-18a^7+1 -18 a^8

20. DF001

i get the adding exponent but i dont know how to add or multiple the m with exponents

21. madhu.mukherjee.946

where are we multiplying m with the exponent?

22. DF001

i used the format that midhun showed me

23. DF001

-4(m^2*m^6)*(-m^6n^-3)

24. DF001

I got -4m^8 * 1/n^2

25. DF001

-4m^8/n^2

26. madhu.mukherjee.946

yeah its perfect

27. DF001

thank you

28. madhu.mukherjee.946

your welcome:) if you still have any problem you can ask me

29. DF001

|dw:1441172138967:dw| I want to ask one thing, my original problem had 4m^-2n

30. DF001

but it seems m^2 is not negative, i was wondering if it was a typo since a^2*a^m=a^m+n

31. madhu.mukherjee.946

pls post your original problem once more

32. DF001

oh nevermind, it was a mistake, sorry. it was correct

33. DF001

sorry, i read the wrong problem

34. madhu.mukherjee.946

its okay

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