Answer: 3ab(4+5)
Explanation:
Find factors between 12ab and 15ab
both terms have variable a.
both terms have variable b.
both numbers 12 and 15 have a greatest common factor of 3.
Meaning the greatest common factor between them is 3ab.
After that, divide each term by 3ab.
3ab/12ab=4
3ab/15ab=5
Use the distributive property to express the equation.
3ab(4+5)