X^3+3x^2-5x+1化简
问题描述：
X^3+3x^2-5x+1化简
请各位帮我把X^3+3x^2-5x+1给化简一下.
答
配方:X^3+3X^2-4X-X+1
=X(X^2+3X-4)-(X-1)
=X(X-1)(X+4)-(X-1)
=(X-1)(X^2+4X-1)