Factor and solve: y^2 -20y+36=0

y^2 -20y+36=0

(y )(y ) ( -18)( -2)=0

(y-18) (y-2) = 0

Solve:

(y-18) =0

y-18+18 =0+18

y=18

Solve:

(y-2) = 0

y-2+2 = 0+2

y=2