Question

Multiply= (19a³+12a²-7a) by 3a​

Answer 1

Answer:

72a4

Step-by-step explanation:

first add 19a3 with 12a2 so a3+a2 = 5a then

19+12=31 so ans come 31a5 the - 31a5 with 7a so

a5-a= a4 then 31-7=24 so ans is 24a4 then multiple 24a4 with 3 so final ans is 72a4