(5z-3)^2-9z^2=0
16z^2-30z+9=0
D=(-30)^2-4*16*9=900-576=324
z1=(18-(-30))/(2*16)=48/32=1.5
z2=(-18-(-30))/(2*16)=12/32=0.375
(5z-3)^2-9z^2=0
16z^2-30z+9=0
D=(-30)^2-4*16*9=900-576=324
z1=(18-(-30))/(2*16)=48/32=1.5
z2=(-18-(-30))/(2*16)=12/32=0.375