(x-2分之x减x+2分之x)乘4x分之2-x
问题描述:
(x-2分之x减x+2分之x)乘4x分之2-x
答
(x-2分之x减x+2分之x)
=(x-2)(x+2)分之x(x+2)-x(x-2)乘4x分之2-x
=(x-2)(x+2)分之4x乘4x分之2-x
=-x-2