1) x1+x2= -b/a
x1*x2= c/a
x1+x2=7/3
x1*x2=4/3
x1=4/3 x2=3/3=1
2) x1+x2=-7/4=-1,75
x1*x2=-15/4=-3,75
x1=1.25 x2=-3
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Answers & Comments
1) x1+x2= -b/a
x1*x2= c/a
x1+x2=7/3
x1*x2=4/3
x1=4/3 x2=3/3=1
2) x1+x2=-7/4=-1,75
x1*x2=-15/4=-3,75
x1=1.25 x2=-3