ANSWER
The quotient is
[tex] 1 + 3xz[/tex]
EXPLANATION
The given expression is
[tex] \frac{3 {x}^{2} y^2+ 9 {x}^{3} {y}^{2} z}{3 {x}^{2} {y}^{2}} [/tex]
We take out the highest common factor in the numerator to obtain
[tex] = \frac{3 {x}^{2} {y}^{2} (1 + 3xz)}{3 {x}^{2} {y}^{2}}[/tex]
We cancel out the common factors to obtain,
[tex] = 1 + 3xz[/tex]