题目内容
(1)
-
+|1-
|
(2)(-2a2b)2•(6ab)÷(-3b2)
(3)(2x-1)(3x+2)-6x(x-2)
(4)(3x-y)2-(3x+2y)(3x-2y)
| (-4)2 |
| 3 | -27 |
| 3 |
(2)(-2a2b)2•(6ab)÷(-3b2)
(3)(2x-1)(3x+2)-6x(x-2)
(4)(3x-y)2-(3x+2y)(3x-2y)
(1)原式=4+3+(
-1)
=4+
-1
=3+
;
(2)原式=4a4b2•6ab÷(-3b2)
=24a5b3÷(-3b2)
=-8a5b;
(3)原式=6x2+4x-3x-2-(6x2-12x)
=6x2+4x-3x-2-6x2+12x
=-13x-2;
(4)原式=9x2+y2-6xy-(9x2-4y2)
=9x2+y2-6xy-9x2+4y2
=5y2-6xy.
| 3 |
=4+
| 3 |
=3+
| 3 |
(2)原式=4a4b2•6ab÷(-3b2)
=24a5b3÷(-3b2)
=-8a5b;
(3)原式=6x2+4x-3x-2-(6x2-12x)
=6x2+4x-3x-2-6x2+12x
=-13x-2;
(4)原式=9x2+y2-6xy-(9x2-4y2)
=9x2+y2-6xy-9x2+4y2
=5y2-6xy.
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