计算1/x-3 - 6/x*x-9 - x-1/6-2x
问题描述:
计算1/x-3 - 6/x*x-9 - x-1/6-2x
答
1/x-3 - 6/x*x-9 - x-1/6-2x
=[2(x+3)-6*2+(x-1)(x+3)]/[2(x+3)(x-3)]
=(x^2+4x-9)/(2x^2-18)