解方程和计算题求解
问题描述：
解方程和计算题求解
解方程：2x-2\3减x-1\3=3；
计算：(a^2-4a+4\a^2-4加a+2\2-a)除以a-2\a；
答
[(a+1)(a+2)/(a^2-4a+4)-a/(a^2-2a)]/[a/(a-2)]
=[(a+1)(a+2)/(a-2)^2-a/a(a-2)]/[a/(a-2)]
=[(a+1)(a+2)/(a-2)^2-1/(a-2)]*(a-2)/a
=(a+1)(a+2)/(a-2)^2*(a-2)/a-1/(a-2)*(a-2)/a
=(a+1)(a+2)/a(a-2) -1/a
=(a+1)(a+2)/a(a-2) -(a-2)/a(a-2)
=[(a+1)(a+2) -(a-2)]/a(a-2)
=(a^2+3a+2-a+2)/a/(a-2)
=(a^2+2a+4)/a(a-2)