Respuesta :

we know that
(2p+7)(3p²+4p-3)=2p*[3p²+4p-3]+7*[3p²+4p-3]
resolving by parts

part 1
2p*[3p²+4p-3]=6p³+8p²-6p

and 
part2
7*[3p²+4p-3]=21p²+28p-21

adding part 1 and part 2
[
6p³+8p²-6p]+[21p²+28p-21]=6p³+29p²+22p-21

the answer is (6p³+29p²+22p-21)