Решите уравнение 10x2 - 17x + 34 = 7x2 - 26x +28

[latex] left { {{5x-y=11} atop {7x+2y=12}} ight. \ \ left { {{y=5x-11} atop {7x+2(5x-11)=12}} ight. \ \ 7x+10x-22=12 \ 17x=34 \ x=2 \ y=5*2-11=10-11=-1[/latex]Ответ: [latex](2;-1)[/latex]

10х2-17х+34-7х2+26х-283х2+9х+6=0Д=81-4*3*6=9х1=-9-3/6=-2х2=-9+3/6=-1

10x2-17x+34=7x2-26x+2810x2-17x+34-7x2+26x-28=03x2+9x+6=0 | :3x2+3x+2=0За Т.Виетаx1 x x2 =2x1 + x2 = -3x1 = -2x2 = -1