如果题目是x四次+3x³+x²-3x-2
=(x四次 -1)+( 3x³-3x)+(x²-1)
= (x²-1)( x²+1+3x+1)
=(x+1)²(x-1)(x+2)
如果题目是x+3x³+x²-3x-2
=(3x³-3x)+(x²+x-2)
=(x-1)(3x²+3x)+(x+2)(x-1)
=(x-1)(3x²+4x+2)
如果题目是x四次+3x³+x²-3x-2
=(x四次 -1)+( 3x³-3x)+(x²-1)
= (x²-1)( x²+1+3x+1)
=(x+1)²(x-1)(x+2)
如果题目是x+3x³+x²-3x-2
=(3x³-3x)+(x²+x-2)
=(x-1)(3x²+3x)+(x+2)(x-1)
=(x-1)(3x²+4x+2)