“your answer should be a polynomial in standard form” (d^2+6d+9)+(d^3+6d+9)

d^3+d^2+12d+18

Step-by-step explanation:

d^2+6d+9+d^3+6d+9

group like terms

d^2+d^3+(6d+6d)+(9+9)

bring to standard form

d^3+d^2+12d+18

5y

step-by-step explanation:

∞ this is your sign