1) x1*x2=16/5>0
x1+ x2 =-17/5<0
x1<0 x2<0
2) x1*x2=56
x1 + x2=-15
3)x1*x2=-0.02
x1+x2=-9
x1<0 x2>0 или наоборот x1>0 x2<0
4)x1*x2=-7/3
x1+x2=-12/4=-3
1) x1*x2=16/5>0
x1+ x2 =-17/5<0
x1<0 x2<0
2) x1*x2=56
x1 + x2=-15
x1<0 x2<0
3)x1*x2=-0.02
x1+x2=-9
x1<0 x2>0 или наоборот x1>0 x2<0
4)x1*x2=-7/3
x1+x2=-12/4=-3
x1<0 x2>0 или наоборот x1>0 x2<0