Question

6z²-5z=21 solving quadratic equations by completing the square​

Answer 1

Answer:

6z²-5z-21=0

6z²-14z+9z-21=0

6z²+9z-14z-21=0

3z(2z+3)-7(2z+3)=0

(3z-7)(2z+3)=0

3z-7=0 , 2z+3=0

z=7/3 , z=-3/2.