求3/2x+4减6/4-x²+1/x-2

问题描述:

求3/2x+4减6/4-x²+1/x-2

原式=3/2(x+2)-6/(x+2)(x-2)+1/(x+2)
=[3(x-2)-6*2+2(x-2)]/2(x+2)(x-2)
=(5x-22)/(2x²-8)