Work Step by Step
By multiplying each term of the polynomial by the factor $-4a$, and then adding the products, we have $$ -4a(1.3a^5+2.5a^2+1)=-4a(1.3a^5)-4a(+2.5a^2)-4a(+1)\\ =-5.2a^6-10a^3-4a .\\ $$
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