因式分解:x^4-4x^3+5x^2+x-6
问题描述:
因式分解:x^4-4x^3+5x^2+x-6
答
x^4-4x³+5x²+x-6
=(x^4-4x³+4x²)+(x²+x-6)
=x²(x²-4x+4)+(x²+x-6)
=x²(x-2)[(x-2)+(x+3)]
=x²(x-2)(2x+1)