Factorise Fully

Question 1:

6k+60
6 k+10

Question 2:

50z+45
5 10z+9

Question 3:

45s+54
9 5s+6

Question 4:

3a2+5a
a 3a+5

Question 5:

7bx+6b
b 7x+6

Question 6:

32d224dg
8d 4d3g