Решить систему уравнений xy=24500 2(x+y)=630

Xy=24500 2(x+y)=630 x+y=315 x=315-y; (315-y)*y=24500; 315-y-y*y-24500=0; y*y-315+24500=0; D=a*a-4b=99225-9800=1225; D=35; y1=(315+35)/2=175; y2=(315-35)/2=140; x1=140; y1=175; x2=175; y2=140.