Question

Система уравнений
Х + 3у = 10
Ху=3

Answer 1

{ x+ 3у = 10
{ xу=3

{ x=10-3y
{ xy=3

(10-3y)*y=3

10y-3y^2=3

10y-3y^2-3=0

-3y^2+10y-3=0

3y^2-10y+3=0

D=100-36=64=8^2

y=(10+-8)/6

y1=3

y2=1/3

x=10-2*3

x=10-3*1/3

x1=1

x2=9

otvet: (x1y1)=(1,3)
  
          (x2y2)=(9,1/3)