factories z2-12z+27
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Answer:
z²-9z-3z+27
z(z-9)-3(z-9)
(z-9)(z-3)
z^2-9z-3z+27=0
z(z-9)-3(z-9)=0
(z-3)(z-9)=0
z=3
z=9
I hope this helps