Odpowiedź: x1+x2=-b/a, x1*x2=c/a
a)x1+x2=1>0
x1*x2=-25<0
więc x1>0 i x2<0
b)x1+x2=-3<0
x1*x2=3/2>0
więc x1<0 i x2<0
c)x1+x2=5/3>0
x1*x2=5/12>0
więc x1>0 i x2>0
d)x1+x2=-5/3<0
x1*x2=4/3>0
więc x1>0 i x2<0
e)x1+x2=-15/2<0
x1*x2=3/2>0
więc x1<0 i x2<0
f)x1+x2=√6/√2>0
x1*x2=1/2√2>0
więć x1>0 i X2>0
