Which expression is it equivalent to

Answer:
B
Step-by-step explanation:
3a plus 2a equals to 5a^2
7 x 5 equals to 35
3a x 5 equals to 15a then 7 x 2a equals to 14a
15a + 14a equals to 29a
so 5a^2 - 29a - 35 is the simplified/equivalent equation