Factorise Fully

Question 1:

8m72
8 m9

Question 2:

30z+36
6 5z+6

Question 3:

72j16
8 9j2

Question 4:

10k2+7k
k 10k+7

Question 5:

5ac2c
c 5a2

Question 6:

15e221eq
3e 5e7q