x1+x2=-5/2;x1x2=-3/2;∴1/x1²+1/x2²=(x2²+x1²)/(x1²x2²)=[(x1+x2)²-2x1x2]/(x1²x2²)=(25/4+3)/(9/4)=37/9;很高兴为您解答,skyhunter002为您答疑解惑如果本题有什么不...