问题
填空题
(x-2)(x2+2x+4)+(x+5)(x2-5x+25)=______.
答案
(x-2)(x2+2x+4)+(x+5)(x2-5x+25),
=x3+2x2+4x-2x2-4x-8+x3-5x2+25x+5x2-25x+125,
=2x3+117.
(x-2)(x2+2x+4)+(x+5)(x2-5x+25)=______.
(x-2)(x2+2x+4)+(x+5)(x2-5x+25),
=x3+2x2+4x-2x2-4x-8+x3-5x2+25x+5x2-25x+125,
=2x3+117.