Answer:
The given expression  on multiplying  is
   on multiplying  is 
Step-by-step explanation:
Consider the given two expressions  and
 and 
We have multiply both expressions,

To multiply two terms first multiply constant numbers that is 6 × 2 = 12
For x , y and z apply property of exponent,

Then power of x together will be,

Similarly for y powers,

Since first term do not have any expression for z so it will remain same.
Thus, the given expression  on multiplying become,
 is
 is 