Answer:
The answer is D.
Step-by-step explanation:
First you have to get rid of brackets by expanding :
[tex]3 {q}^{2} + {r}^{3} + 5r - 8q + 2( {q}^{2} + r)[/tex]
[tex] = 3 {q}^{2} + {r}^{3} + 5r - 8q + 2 {q}^{2} + 2r[/tex]
Next you have to simplify by collecting like terms :
[tex] {r}^{3} + 3 {q}^{2} + 2 {q}^{2} + 5r + 2r - 8q[/tex]
[tex] = {r}^{3} + 5 {q}^{2} - 8q + 7r[/tex]
