Answer:
sorry is i m wrong hope this will help you
Explanation:
z²-12z+24=0
z²-6x-6z+36-12=0
z(z-6)-6(z-6)-12=0
(z-6)(z-6-12)=0
(z-6)(z-18)=0
either
z-6=0
z=6
or
z-18=0
z=18
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