因式分解x^-(2n+1)x+n^+n
问题描述:
因式分解x^-(2n+1)x+n^+n
答
原式=x²-2nx-x+n²+n
=x²-2nx+n²-x+n
=(x-n)²-(x-n)
=(x-n)(x-n-1)