Question

Помогите ребятки))) па брацки

Answer 1

$left { {{ sqrt{x-y+5}=3} atop { sqrt{x+y-5}=11-2x }} right. \ \ left { {{x-y-5=9} atop {x+y-5=121-44x+4 x^{2} }} right. \ \ left { {{x-y=4} atop {x+y-5-121+44x-4 x^{2} =0}} right. \ \ left { {{y=x-4} atop {4 x^{2} -45x-y+126=0}} right. \ \ 4x^2-45x-x+4+126=0 \ \ 4x^2-46x+130=0 \ \ D=(-46)^2-4*4*130=36>0 \ \ x_{1}= frac{46- sqrt{36} }{2*4}=5 \ \ x_{2}= frac{46+ sqrt{36} }{2*4}=6.5 \ \ y_{1} = 5-4=1 \ \ y_2=6.5-4=2.5$

Ответ: (5; 1) и (6,5: 2,5)