x^2+(k+2)x+(k+1)因式分解
问题描述:
x^2+(k+2)x+(k+1)因式分解
答
原式=x²+kx+2x+k+1
=(x²+2x+1)+(kx+k)
=(x+1)²+k(x+1)
=(x+1)(x+1+k)