Need help on polynomial expressions

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Need help on polynomial expressions

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Answer:- 10[tex]m^{2}[/tex] + 3m -9Step-by-step explanation: Given ;     A= -3 -m   B= 3m -5[tex]m^{2}[/tex]  2B + 3A         solution      2B + 3Asubstitute A and B in the formula     2(3m - 5[tex]m^{2}[/tex]) + 3(-3 -m)     6m - 10[tex]m^{2}[/tex] - 9 - 3m   group like terms     - 10[tex]m^{2}[/tex] + (6m -3m) -9      - 10[tex]m^{2}[/tex] + 3m -9

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