Question

Решите систему уравнений
3x - y = 1
xy = 10

Answer 1

{3х – у = 1
{ху = 10

{у = – 1 + 3х
{ху = 10

{х(– 1 + 3х) = 10

{х = 2
{х = – 5/3

{х = – 1 + 3 • 2
{х = – 1 + 3 • (– 5/3)

{х = 5
{х = – 6

[ х₁ ; у₁ ] = [ 5 ; 2 ]
[ х₂ ; у₂ ] = [ – 5/3 ; – 6 ]

Answer 2

Спасибо