Question

http://prntscr.com/8ftxq1

Answer 1

@butterflydreamer

Answer 2

21 , 7 , and 49 all have 7 as their factor so 7 goes outside

Answer 3

the common for a is a^2 so that goes outside with 7

Answer 4

for b, all of them have at least b^4

Answer 5

so 7a2b4 • (3a5 + 7a3b3c - b)

Answer 6

so my answer is a?

Answer 7

yes

Answer 8

thnx

Answer 9

yw ^_^