X的二次方-4分之x的平方+2x减x-2分之2,.

问题描述:

X的二次方-4分之x的平方+2x减x-2分之2,.
要过程,化简

(x²+2x)/(x²-4)-2/(x-2)
=x(x+2)/(x+2)(x-2)-2/(x-2)
=x/(x-2)-2/(x-2)
=(x-2)/(x-2)
=1