写出下列等式中未知的分子或分母 (4-x^2)/(x+2)^2=( )/(x+2)

问题描述:

写出下列等式中未知的分子或分母 (4-x^2)/(x+2)^2=( )/(x+2)

(4-x^2)/(x+2)^2=( )/(x+2)的分子为(2-x)