25z ² - 11 < (25z ² + 10z+1-13z
13z-10z<11+1
3z<12
z<4
25z^2-11<25z^2+10z+1-13z
25z^2-11-25z^2-10z-1+13z<0
25z ² - 11 < (25z ² + 10z+1-13z
13z-10z<11+1
3z<12
z<4
25z^2-11<25z^2+10z+1-13z
25z^2-11-25z^2-10z-1+13z<0
3z<12
z<4