Find the sum.

(14x2 + 7x) + 9x2 =

Select one of the options below as your answer:

A.

30x2

B.

30x5

C.

22x2 + 7x

D.

23x2 + 7x

Since you cannot add numbers which have x to the power of something and normal x, A and B are incorrect. C is also incorrect because I don't even know how you could get that number.

D is correct.

(14x2 + 7x) + 9x2 - you don't even need the brackets, so

14x2 + 7x + 9x2

(14x2 + 9x2) + 7x

23x2 + 7x