x²+3x+2=(x-1)²+B(x-1)+C.求B,C
问题描述:
x²+3x+2=(x-1)²+B(x-1)+C.求B,C
答
(x-1)²+B(x-1)+C=x²-2x+1+Bx-B+C=x²+(B-2)+(1-B+C)=x²+3x+2;
B-2=3; B=5
1-B+C=2; C=6