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Perform the operation indicated, then place the answer in the proper location on the grid. Write your answer in descending powers of m. (5m 3 + 3mn 2) + (-7m 2n + mn 2 - n 3) - (mn 2 + 2m 3)

Answer :

Answer:

The given expression in descending powers of m is  

[tex]{\bf 3m^3+3m^2n-7m^2n-n^3}[/tex]  

Step-by-step explanation:

The given expression is [tex](5m^3+3mn^2)+(-7m^2n+mn^2-n^3)-(mn^2+2m^3)[/tex]

Now solve the above expression

[tex](5m^3+3mn^2)+(-7m^2n+mn^2-n^3)-(mn^2+2m^3)=5m^3+3mn^2-7m^2n+mn^2-n^3-mn^2-2m^3 [/tex]

[tex](5m^3+3mn^2)+(-7m^2n+mn^2-n^3)-(mn^2+2m^3) = 3m^3+3m^2n-7m^2n-n^3[/tex]                                                           (where  [tex]mn^2[/tex] and [tex]-mn^2[/tex] getting cancelled because of alternate signs)

Therefore the above expression  in descending powers of m  is

[tex]3m^3+3m^2n-7m^2n-n^3[/tex]  

                                                                   

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