(x+1)方+(x+2)方(x-2)方-6x立方除3x

问题描述:

(x+1)方+(x+2)方(x-2)方-6x立方除3x
(x+2)方 + (x-2)方

若原题为(x+1)²+(x+2)²+(x-2)²-6x³/3x则原式=x²+2x+1+x²+4x+4+x²-4x+4-2x²=x²+2x+9若原题为(x+1)²+(x+2)²+(x-2)²-6x³除3x 【是除而不是除以】...