Question

Apply the distributive property to factor out the greatest common factor.

15+21= ?

Answer 1

15 + 21 = 3(5 + 7)

Explanation:

`\text{The distributive property:}\ a(b+c)=ab+ac\\\\15=3\cdot5\\21=3\cdot7\\\\15+17=3\cdot5+3\cdot7=3\cdot(5+7)`