合并同类项: ⑴3x2-1-2x-5+3x-x2 ⑵-0.8a2b-6ab-1.2a2b+5ab+a2b ⑶ ⑷6x2y+2xy-3x2y2-7x-5yx-4y2x2-6x2y (5)4x2y-8xy2+7-4x2y+12xy2-4, (6)a2-2ab+b2+2a2+2ab - b2. 查看更多

 

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合并同类项:
(1)3x2-1-2x-5+3x-x2
(2)-0.8a2b-6ab-1.2a2b+5ab+a2b
(3)
2
3
a2-
1
2
ab+
3
4
a2+ab-b2

(4)6x2y+2xy-3x2y2-7x-5yx-4y2x2-6x2y
(5)4x2y-8xy2+7-4x2y+12xy2-4
(6)a2-2ab+b2+2a2+2ab-b2

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合并同类项:
(1)3x2-1-2x-5+3x-x2
(2)-0.8a2b-6ab-1.2a2b+5ab+a2b
(3)数学公式
(4)6x2y+2xy-3x2y2-7x-5yx-4y2x2-6x2y
(5)4x2y-8xy2+7-4x2y+12xy2-4
(6)a2-2ab+b2+2a2+2ab-b2

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