x立方-4x+3
=x³-x²+x²-4x+3
=x²(x-1)+(x-1)(x-3)
=(x-1)(x²+x-3)
a五次+a+1
=a^5-a²+a²+a+1
=a²(a³-1)+(a²+a+1)
=a²(a-1)(a²+a+1)+(a²+a+1)
=(a²+a+a)(a³-a²+1)
a三次*b两次+ab两次+30b两次
=b²(a³+a+30)
=b²(a³+3a²-3a²+a+30)
=b²[a²(a+3)-(3a-10)(a+3)]
=b²(a+3)(a²-3a+10)
x立方-4x+3
=x³-x²+x²-4x+3
=x²(x-1)+(x-1)(x-3)
=(x-1)(x²+x-3)
a五次+a+1
=a^5-a²+a²+a+1
=a²(a³-1)+(a²+a+1)
=a²(a-1)(a²+a+1)+(a²+a+1)
=(a²+a+a)(a³-a²+1)
a三次*b两次+ab两次+30b两次
=b²(a³+a+30)
=b²(a³+3a²-3a²+a+30)
=b²[a²(a+3)-(3a-10)(a+3)]
=b²(a+3)(a²-3a+10)