因式分解:4m^2n^2-(m^2+n^2+x^2)^2
问题描述：
因式分解:4m^2n^2-(m^2+n^2+x^2)^2
答
4m^2n^2-(m^2+n^2+x^2)^2
＝[2mn+(m²+n²+x²)][2mn-(m²+n²+x²)]
=(2mn+m²+n²+x²)(2mn-m²-n²-x²)