Question

factor.
7y + 21

Explanation:

Step1: Find the GCF

The greatest common factor (GCF) of \(7y\) and \(21\) is \(7\), since \(7\) divides both \(7y\) (as \(7y\div7 = y\)) and \(21\) (as \(21\div7 = 3\)).

Step2: Factor out the GCF

Using the distributive property \(ab + ac = a(b + c)\), we factor out \(7\) from \(7y + 21\). So, \(7y+21 = 7(y + 3)\).

Answer:

\(7(y + 3)\)