一元高次因式分解X立方-4X平方+4X-1
一元高次因式分解
X立方-4X平方+4X-1
=(x³-1)-4x²+4x
=(x-1)(x²+x+1)-4x(x-1)
=(x-1)(x²+x+1-4x)
=(x-1)(x²-3x+1)