Question

hey..gyzz plzz help....
plzz solve the next...plzz​

Answer 1

104-2y

------------ *y=640

2

104y-2y^2=1280

taking 2 as common

52y-y^2=640

y^2-52y+640=0

y^2-32y-20y+640=0

y(y-32) -20(y-32) =0

(y-20)(y-32)=0

y=32,20