x的三次方减去4x的两次方加上4x减1

Question

x的三次方减去4x的两次方加上4x减1

Answer 1

是要分解因式么
x³-4x²+4x-1
=x³-1-(4x²-4x)
=(x-1)(x²+x+1)-4x(x-1)
=(x-1)(x²-3x+1)