# How do you simplify: 1/4x^2y^2z+25/4x^2z-5/2x^2yz?

$\left(\frac{1}{4}\right) {x}^{2} {\left(y - 5\right)}^{2} z$
The factors are ${x}^{2} \mathmr{and} z$, Also, factor $\left(\frac{1}{4}\right)$ would leave the numerical coefficients as integers.
So, the expression = $\left(\frac{1}{4}\right) {x}^{2} z \left({y}^{2} - 10 y + 25\right) = \left(\frac{1}{4}\right) {x}^{2} z {\left(y - 5\right)}^{2}$