Answer:
(2b+5)(5a+6)
Explanation:
Rearrange the expression to make it easy to factor...
10ab + 12b + 30 + 25a
We can factor the first half of the expression and the second half separately...
10ab+12b
The greatest common factor is 2b, so we can divide both terms by 2b to get...
2b(5a+6)
30+25a
The greatest common factor is 5, so we can divide both terms by 5 to get...
5(6+5a)
2b(5a+6)+5(5a+6)
Since both 2b and 5 are being multiplied by 5a+6, we can combine them to get...
(2b+5)(5a+6)