Factorizing an expression involves writing the expression in simpler forms
The values of z are
or 
The equation is given as:

Expand the equation

Factorize the expression:

Factor out z - 4

Split
or 
Solve for z
or 
Hence, the values of z are
or 
Read more about factorization at:
brainly.com/question/11579257
Answer:
k=-j=15
Step-by-step explanation:
See attachment for step by step :)
-36x+30
-24x+20
-18x+15
-12x+10