题目内容
计算:
(1)(2-3)0-(
)-2+(
)2010×(-4)2010
(2)2(a4)3-a2a10+(-2a5)2÷a2
(3)(x-1)(x-2)-3x(x+3)+2(x+2)(x-1),其中x=
.
(1)(2-3)0-(
| 1 |
| 2 |
| 1 |
| 4 |
(2)2(a4)3-a2a10+(-2a5)2÷a2
(3)(x-1)(x-2)-3x(x+3)+2(x+2)(x-1),其中x=
| 1 |
| 3 |
(1)原式=1-4+(-
×4)2010
=-3+1
=-2;
(2)原式=2a12-a12+4a10÷a2
=a12+4a8;
(3)原式=x2-3x+2-3x2-9x+2x2+2x-4
=-10x-2,
当x=
时,原式=-
-2=-
.
| 1 |
| 4 |
=-3+1
=-2;
(2)原式=2a12-a12+4a10÷a2
=a12+4a8;
(3)原式=x2-3x+2-3x2-9x+2x2+2x-4
=-10x-2,
当x=
| 1 |
| 3 |
| 10 |
| 3 |
| 16 |
| 3 |
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