x1+x2=-3/2
x1x2=-2
x21+x22=(x1+x2)²+2x1x2=9/4-4=-7/4
(x1+1)(x2+1)=x1x2+x1+x2+1=-3/2-2+1=-5/2
|x1-x2|²=(x1+x2)²-2x1x2=9/4+4=25/4
|x1-x2|=5/2
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x1+x2=-3/2
x1x2=-2
x21+x22=(x1+x2)²+2x1x2=9/4-4=-7/4
(x1+1)(x2+1)=x1x2+x1+x2+1=-3/2-2+1=-5/2
|x1-x2|²=(x1+x2)²-2x1x2=9/4+4=25/4
|x1-x2|=5/2
土豆团邵文潮为您答疑解难.
如果本题有什么不明白可以追问,