Ответ:
3/5
Пошаговое объяснение:
y-x=2
(x-2)/(y+5)=x/y-0.5
y=x+2
(x-2)/(x+7)=x/(x+2)-0.5
(x-2)*(x+2)/(x+7)=(x+2)*(x/(x+2)-1/2)
(x^2-4)/(x+7)=x/2-1
(x^2-4)/(x+7)*(x+7)=(x/2-1)*(x+7)
x^2-4=x^2/2+5x/2-7
0.5x^2-2.5x+3=0
D=-2.5^2-4*0.5*3=0.25
x1=(√0.25-(-2.5))/(2*0.5)=3
x2=(-√0.25-(-2.5))/(2*0.5)=2
y1=3+2=5
y2=2+2=4
x1/y1=3/5=0.6
x2/y2=2/4=0.5
(3-2)/(5+5)=1/10=0.1
0.6-0.1=0.5
(2-2)/(4+5)=0/9=0
0.5-0=0.5