Question

{x-3y=2 ;
{xy-4y=8
решите систему уравнений

Answer 1

{x-3y=2
{xy-4y=8

{x=2+3y
{xy-4y=8

(2+3y)y-4y=8

y=2
y=-4/3

x=2+3*2
x=2+3*(-4/3)

x=8
x=-2

{8-3*2=2
{8*2-4*2=8

{-2-3*(-4/3)=2
{-2*(-4 el-4*(-4/3)=8

{2=2
{8=8

(x1,y2)=(8,2)
(x2,y2)=-2,-4/3)