Question

1. Which expressions are completely factored?

Select each correct answer.

24a^4+18=6(4a^4+3)

12a^3+8a=4(3a^3+2a)

16a^5−20a^3=4a^3(4a^2−5)

30a^6−24a^2=3a^2(10a^4−8)

Answer 1

All but B, as on B an a can be factored out