Factor and solve: z^2 -12z+27=0

Asked by AnneS2 12 years ago 9/23/2013 5:45 AM

Last updated by anonymous 12 years ago 9/25/2013 10:17 AM

Answered by CherieS 12 years ago 9/25/2013 10:17 AM

z^2 -12z+27=0

(z )( z ) ( -9)( -3)=0

(z-9) (z-3) = 0

Solve:

(z-9)=0

z-9+9=0+9

z=9

Solve:

(z-3) = 0

z-3+3 = 0+3

z=3