Explanation
the distributive property is that multiplying a number by a sum is the same as doing each multiplication separately
[tex]a(b+c)=ab+ac[/tex]Step 1
[tex]3xy+6xyz-12yz[/tex]get the factors of each term
[tex]\begin{gathered} 3xy=3\cdot x\cdot y \\ 6xyz=2\cdot3\cdot x\cdot y\cdot z \\ -12yz=2\cdot2\cdot3\cdot y\cdot z \end{gathered}[/tex]the commom factor is 3y
hence factorize 3y
[tex]\begin{gathered} 3xy+6xyz-12yz \\ 3xy+6xyz-12yz=3y(\frac{3xy}{3y}+\frac{6xyz}{3y}-\frac{12yz}{3y}) \\ 3xy+6xyz-12yz=3y(x+xz-4z) \end{gathered}[/tex]I hope this helps you