Work Step by Step
By multiplying each term of the polynomial by the factor $1.28m$, and then adding the products, we have $$ 1.28m(2.3m^2 + 4.7n^2)=1.28m(2.3m^2) +1.28m( 4.7n^2)\\ =2.94 m^3+6.02mn^2 .\\ $$
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