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

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

(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】
则原式=(x+1)²+(x+2)²+(x-2)²+(x+2)²-3x/6x³
=x²+2x+1+x²+4x+4+x²-4x+4-1/2x²
=3x²+2x+9-1/2x²

(x+1)方+(x+2)方(x-2)方-6x立方除3x
=x方+2x+1+x方+4x+4+x方-4x+4-2x方
=x方+2x+9