Question

решите систему уравнений
{x-y=3
{x^2+y^2=25-2xy

Answer 1

{x-y=3
{x^2+2xy+y^2=25

{x-y=3
{(x+y)^2=25

{x-y=3
{x+y=5

{x=5-y
{5-y-y=3

{x=5-y
{-2y=-2

{x=4
{y=1
наверно так)