Question 1062836
y(y+4)=780
y^2+4y=780
y^2+4y-780=0
(y+30)(y-26)=0; Guess and check,start with 78/10, then 39/20, then look for two factors close together.
y=-30, 26, only the first is sensible.
Victor is 26 ANSWER
Fred is 30
The product is 780