数学问题（x+2)³-(x-2)³=3（2x+3)(2x-3)-5x
问题描述：
数学问题（x+2)³-(x-2)³=3（2x+3)(2x-3)-5x
答
（x+2)³-(x-2)³=3（2x+3)(2x-3)-5x==>(x+2-x+2)[(x+2)²+(x+2)(x-2)+(x-2)²]=3(4x²-9)-5x==>4(x²+4x+4+x²-4+x²-4x+4)=12x²-5x-27==>4(3x²+4)=12x²-5x-27==>1...