Posted by RNRH on .
25z^2=10z

Equations and Inequalities 
PsyDAG,
I don't know for sure since you didn't ask a question, but I assume you want to solve this equation.
Add 10z to both sides.
25z^2 + 10z = 0
Factor.
5z(5z +2) = 0
Solve each factor in relation to zero.