Question

化简（x平方-4x+4分之x平方-4 + x+2分之2-x)÷x-2分之

Answer 1

[(x平方-4x+4)分之(x平方-4) + (x+2)分之(2-x)]÷ (x-2)分之x

=[(x-2)分之(x+2) + (x+2)分之(2-x)] × x分之(x-2)

=(x²-4)分之[(x+2)²-(x-2)²]× x分之(x-2)

=[x(x+2)]分之4x

=(x+2)分之4