Factor and solve: z^2 -13z+42=0

Asked by AnneS2 12 years ago 9/20/2013 5:56 AM

Last updated by anonymous 12 years ago 9/21/2013 11:05 AM

Answered by CherieS 12 years ago 9/21/2013 11:05 AM

z^2 -13z+42=0

(z )(z ) ( -7)( -6)=0

(z-7) (z-6) = 0

Solve:

(z-7) =0

z-7+7 =0+7

z=7

Solve:

(z-6) = 0

z-6+6 = 0+6

z=6