计算:4x(x-1)2+x(2x+5)(5-2x)=_.
问题描述:
计算:4x(x-1)2+x(2x+5)(5-2x)=______.
答
4x(x-1)2+x(2x+5)(5-2x),
=4x(x2-2x+1)+x(25-4x2),
=4x3-8x2+4x+25x-4x3,
=-8x2+29x.
故本题答案为:-8x2+29x.