X-y=6 , x^2+ y^2=20 теңдеулер жүйесі

6+2=8,20-8=12. ответ

X-y=6
x^2+y^2=20

x=6+y
(6+y)^2+y^2=20

x=6+y
36+12y+y^2+y^2=20

x=6+y
2*y^2 +12y+36-20 =0

x=6+y
2*y^2 +12y+16 =0

x=6+y
y^2 +6y+4=0
D=36-16=20
y=(-6+2V5)/2
y=(-6-2V5)/2

y=-3+V5
y=-3-V5

y=-3+V5 y=-3-V5
x=3+V5 x=3-V5