题目内容
计算
(1)30-2-3+(-3)2
(2)a(a3)2+(a2)3-a•a5
(3)(x+2)2-(x-1)(x-2)
(1)30-2-3+(-3)2
(2)a(a3)2+(a2)3-a•a5
(3)(x+2)2-(x-1)(x-2)
(1)原式=1-
+9=9
;
(2)a•a6+a6-•a6=a7;
(3)原式=x2-2x+4-x2+3x-2=x+2.
| 1 |
| 8 |
| 7 |
| 8 |
(2)a•a6+a6-•a6=a7;
(3)原式=x2-2x+4-x2+3x-2=x+2.
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