Question

化简 （x-2分之x-x+2分之x）÷2-x分之4x（用两种方法）急急急急急急急急急急急急！！！

Answer 1

[(x-2)分之x-(x+2)分之x]÷(2-x)分之(4x)
=[(x-2)分之x-(x+2)分之x]×(-4x)分之(x-2)
=(x-2)分之x×(-4x)分之(x-2)-(x+2)分之x×(-4x)分之(x-2)
=-4分之1+[4(x+2)]分之(x-2)
=[4(x+2)]分之[-(x+2)+(x-2)]
=[4(x+2)]分之(-4)
=-(x+2)分之1

[(x-2)分之x-(x+2)分之x]÷(2-x)分之(4x)
=[(x+2)(x-2)]分之[x(x+2)-x(x-2)]×(-4x)分之(x-2)
=[(x+2)(x-2)]分之[x(x+2-x+2)]×(-4x)分之(x-2)
=[(x+2)(x-2)]分之(4x)×(-4x)分之(x-2)
=-(x+2)分之1