3z² = 198+15z

Question

3z² = 198+15z

Answer 1

3z^2-15z-198=0

D=51^2

z=11

z=-6

Answer 2

3z^2=198+15z

z^2-5z-66=0

d=25-4*1*(-66)=289

z1=5-17/2=-6

z2=5+17/2=11