问题
解答题
化简 (1)(-2)3×
(2)(6+x)(6-x)+(x-3)2-1. |
答案
(1)原式=-8×4-4×
-31 4
=-32-1-3
=-36;
(2)原式=36-x2+(x2-6x+9)-1
=36-x2+x2-6x+9-1
=44-6x.
化简 (1)(-2)3×
(2)(6+x)(6-x)+(x-3)2-1. |
(1)原式=-8×4-4×
-31 4
=-32-1-3
=-36;
(2)原式=36-x2+(x2-6x+9)-1
=36-x2+x2-6x+9-1
=44-6x.