问题
解答题
计算
(1)a3-a3+(-2a3)2+(a2)3
(2)(x-1)(x+2)+(-x+1)(x-3)
答案
(1)原式=a6+4a6+a6
=(1+4+1)a6
=6a6;
(2)原式=x2+2x-x-2-x2+3x+x-3
=5x-5.
计算
(1)a3-a3+(-2a3)2+(a2)3
(2)(x-1)(x+2)+(-x+1)(x-3)
(1)原式=a6+4a6+a6
=(1+4+1)a6
=6a6;
(2)原式=x2+2x-x-2-x2+3x+x-3
=5x-5.