x方+4x+3分之x方-x-2约分是什么
问题描述：
x方+4x+3分之x方-x-2约分是什么
答
(x²-x-2)/(x²+4x+3)
=(x+1)(x-2)/(x+1)(x+3)
=(x-2)/(x+3)
答
x方+4x+3分之x方-x-2
=(x-2)(x+1)/[(x+3)(x+1)]
=(x-2)/(x+3)
答
=(x+3)(x+1)分之(x+1)(x-2)
=(x+3)分之(x-2)