Question

512 (3) 513 (3) 515 (3)

Answer 1

х²+у²=34; ху=15; (15/у)²+у²=34; ху=15;(225+у⁴)/у² =34; у⁴ -34у²+225=0; у² =а; а²-34а+225=0; Д=256; а₁ =25; а₂ =9; у² =25; у² =9; у₁ = -5;5 ;у₂ =3; -3; х₁ = -3;3; х₂ =5; -5.....Ответ: ( -3; -5),(3;5); (5;3),( -5; -3)