用整式的乘法解答4x的三次方-(x-2)(3x+1)-2(x-1)(2x的平方-5x+1)
问题描述:
用整式的乘法解答4x的三次方-(x-2)(3x+1)-2(x-1)(2x的平方-5x+1)
答
(4x)3-(x-2)(3x+1)-2(x-1)(4x2-5x+1)
=64x3-3x2-x+6x+2-8x3+18x2-12x+2
=56x3+15x2-7x+4
答
4x的三次方-(x-2)(3x+1)-2(x-1)(2x的平方-5x+1)
=4x³-3x²+5x+2-4x³+4x²+10x²-10x-2x+2
=11x²-7x+4