z^2 -22z+57=0 Factor and solve

z^2 -22z+57=0

(z )(z ) ( -19)( -3)=0

(z-19) (z-3) = 0

Solve:

(z-19) =0

z-19+19 =0+19

z=19

Solve:

(z-3) = 0

z-3+3 = 0+3

z=3