作业帮已知A=6X²-4X-2,B=-2X²+5,C=2X-3求(A+B)[2A-(C-3B)]A=2a²-3ab-2b²,B=2a²+ab-3b²则B-A等于___________________+（3X²-2X-6）=-2X²-7X+1减-3X等于5X²-3X-5的多项式为_________多项式axy²-3分之1x
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![已知A=6X²-4X-2,B=-2X²+5,C=2X-3求(A+B)[2A-(C-3B)]A=2a²-3ab-2b²,B=2a²+ab-3b²则B-A等于___________________+（3X²-2X-6）=-2X²-7X+1减-3X等于5X²-3X-5的多项式为_________多项式axy²-3分之1x](/uploads/image/z/4028289-33-9.jpg?t=%E5%B7%B2%E7%9F%A5A%3D6X%26%23178%3B-4X-2%2CB%3D-2X%26%23178%3B%2B5%2CC%3D2X-3%E6%B1%82%28A%2BB%29%5B2A-%28C-3B%29%5DA%3D2a%26%23178%3B-3ab-2b%26%23178%3B%2CB%3D2a%26%23178%3B%2Bab-3b%26%23178%3B%E5%88%99B-A%E7%AD%89%E4%BA%8E___________________%2B%EF%BC%883X%26%23178%3B-2X-6%EF%BC%89%3D-2X%26%23178%3B-7X%2B1%E5%87%8F-3X%E7%AD%89%E4%BA%8E5X%26%23178%3B-3X-5%E7%9A%84%E5%A4%9A%E9%A1%B9%E5%BC%8F%E4%B8%BA_________%E5%A4%9A%E9%A1%B9%E5%BC%8Faxy%26%23178%3B-3%E5%88%86%E4%B9%8B1x)
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已知A=6X²-4X-2,B=-2X²+5,C=2X-3求(A+B)[2A-(C-3B)]A=2a²-3ab-2b²,B=2a²+ab-3b²则B-A等于___________________+（3X²-2X-6）=-2X²-7X+1减-3X等于5X²-3X-5的多项式为_________多项式axy²-3分之1x
已知A=6X²-4X-2,B=-2X²+5,C=2X-3
求(A+B)[2A-(C-3B)]
A=2a²-3ab-2b²,B=2a²+ab-3b²
则B-A等于_________
__________+（3X²-2X-6）=-2X²-7X+1
减-3X等于5X²-3X-5的多项式为_________
多项式axy²-3分之1x与bxy²+4分之3x的和是一个单项式,则a,b的关系是________
一般的,几个整式相加减,如果有括号就________,然后___________.
已知A=6X²-4X-2,B=-2X²+5,C=2X-3求(A+B)[2A-(C-3B)]A=2a²-3ab-2b²,B=2a²+ab-3b²则B-A等于___________________+（3X²-2X-6）=-2X²-7X+1减-3X等于5X²-3X-5的多项式为_________多项式axy²-3分之1x
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