Question

factories z2-12z+27​

Answer 1

Answer:

z²-9z-3z+27

z(z-9)-3(z-9)

(z-9)(z-3)

Answer 2

z^2-12z+27=0
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