x的4次方+4x的3次方一3x的平方一4x一4
=x²(x²+4x+4）-4x²-3x²-4x-4
=x²(x+2）²-（x+2)²-6x²
=(√3-2）²（√3-2+2）²-（√3-2+2)²-6(√3-2)²
=-3(√3-2)²-3
=12√3-24