解：根据韦达定理可得到：x1+x2=3/2x1x2=-2则：（x1+1）（x2+1）=x1x2+(x1+x2)=-2+3/2=-1/2x1平方+x2平方=（x1+x2)平方-2x1x2=9/4+4=25/4
x1+x2=-a/bx1*x2=c/ax1^2+x2^2=(x1+x2)^2-2x1*x2 a=2 b=-3 c=-4
123/123
