[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]
Let's solve ~
[tex]\qquad \sf \dashrightarrow \: ( - 3 {p}^{3} + 5 {p}^{2} - 2 p) + ( - p {}^{3} - 8 {p}^{2} - 15p)[/tex]
[tex]\qquad \sf \dashrightarrow \: - 3 {p}^{3} + 5 {p}^{2} - 2 p - p {}^{3} - 8 {p}^{2} - 15p[/tex]
[tex]\qquad \sf \dashrightarrow \: - 3 {p}^{3} -p³+ 5 {p}^{2} - 8 {p}^{2} -2p - 15p[/tex]
[tex]\qquad \sf \dashrightarrow \: - 4{p}^{3} -3 {p}^{2} - 17p [/tex]
