x=6-y
6-y+y+y(6-y)²+y²(6-y)=24
6+y³-12y²+36y+6y²-y³=24
-6y²+36y-18=0
y²-6y+3=0
D= 36-12= 24
y1= (6+√24)/2= 3+√6
y2= (6-√24)/2= 3-√6
x1= 6-3-√6= 3-√6
x2= 6-3+√6= 3+√6
пары чисел: (3-√6;3+√6) и (3+√6;3-√6)
1) х+у=34,12+19,6=53,72= 53,8
х-у=34,12-19,6=14,52+14,6
х*у=34,12*19,6= 668,752=669
х:у=34,12:19,6=1,7408163=1,8
2) х+у=2,05+1,2=3,25=3,3
х-у=2,05-1,2=0,85=0,9
х*у=2,05*1,2= 2,46=2,5
х:у =2,05:1,2=1,7083333=1,8