x+y=14
xy=40
y=14-x
x(14-x)=40
14x-x^2=40
x^2-14x+40=0
D=196-160=36
x=(14+-6)/2
x1=10
x2=4
y1=4
y2=10
x+y=14
xy=40
y=14-x
x(14-x)=40
14x-x^2=40
x^2-14x+40=0
D=196-160=36
x=(14+-6)/2
x1=10
x2=4
y1=4
y2=10