x的2次方-4分之x-6-2x-x的2次方分之2_数学解答

x的2次方-4分之x-6-2x-x的2次方分之2

人气：353 ℃　时间：2020-03-25 09:27:08

解答

(x-6)/(x^2-4)-2/(2x-x)^2
=(x-6)/[(X-2)(x+2)]-2/[x(2-x)]^2
=(x-6)/[(X-2)(x+2)]-2/[x(x-2)]^2
=[1/(x-2)][(x-6)/(x+2)-2/x(x-2)]
=[1/(x-2)][(x-6)x(x-2)-2(x+2)]/[(x-2)x(x+2)]
=(x^3-8x^2+10x-4)/[(x-2)^2x(x+2)].