题目内容
计算题:
(1)
-
+2
(2)(x+3)(x-4)-(x-1)2
(3)(x4+2x3-
x2)÷(-
x)2.
(1)
25 |
3 | -8 |
1 |
4 |
(2)(x+3)(x-4)-(x-1)2
(3)(x4+2x3-
1 |
2 |
1 |
2 |
(1)原式=5-(-2)+1=5+2+1
=8;
(2)原式=x2-4x+3x-12-x2+2x-1
=x-13;
(3)原式=(x4+2x3-
x2)÷
x2
=4x2+8x-2.
=8;
(2)原式=x2-4x+3x-12-x2+2x-1
=x-13;
(3)原式=(x4+2x3-
1 |
2 |
1 |
4 |
=4x2+8x-2.
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