Question

{х^2 +у^2 =5
{6х + 5у =-4

Answer 1

{ x² + у² = 5

{ 6х + 5у = -4

6x + 5y = -4

5y = -4 - 6x

y = (-4 - 6x) / 5

x² + (-4 - 6x)² = 5

x² + 16 + 48x + 36x² = 5

37x² + 48x + 11 = 0

D = 2304 - 1628 = 676 = 26²

x = (-48 ± 26) / 74

х1 = -1 => у1 = 0.4

х2 = -11/37 => у2 = 212/37 = 5+27/37

Ответ: (-1; 0.4); (-11/37; 5+27/37).