x1+x2=7/4
x1x2=-3/4
2/x1+2/x2=2(x1+x2)/x1x2=-14/3
|x1-x2|=√[(x1+x2)²-4x1x2]=√97/4
x1²+x2²=(x1+x2)²-2x1x2=73/16