已知f（x+1）＝x²-3x+2.求f(x)的解析式.

已知f（x+1）＝x²-3x+2.求f(x)的解析式.

已知f（x+1）＝x²-3x+2
令x+1=t
x=t-1
f(t)=(t-1)方-3(t-1)+2
=t方-5t+6
所以
f(x)=x方-5x+6