5. 6a^2 + 10a
6. 21h^2 - 9h
Step-by-step explanation:
(2a*3a) + (2a*5) = 6a^2 + 10a
(-3h)*(-7h) + (-3h)*3 = 21h^2 - 9h
answ9x x 3=
step-by-step explanation: