计算:4x(x²+1)-(x-1)(3x+1)
问题描述:
计算:4x(x²+1)-(x-1)(3x+1)
要有过程!
答
4x(x²+1)-(x-1)(3x+1)
=4x^3+4x-(3x²+x-3x-1)
=4x^3+4x-(3x²-2x-1)
=4x^3+4x-3x²+2x+1
=4x^3-3x²+6x+1