(32/x+2)+(32/x-2)=3.6 X等于多少?
问题描述：
(32/x+2)+(32/x-2)=3.6 X等于多少?
答
(32/x+2)+(32/x-2)=3.6 [32(x-2)+32(x+2)]/[(x+2)(x-2)=3.664x/[x^2-4]=3.664x=3.6x^2-14.49x^2-160x-36=0[3x-80/3]^2=36+6400/9=6724/93x-80/3=+/-82/3x1=162/9x2=-2/9