-2b 图6 44. 解:原式= ····················································································· = ··································································································· 【
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2、把方程2x-2=6-3x移项,得( )
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已知关于x,y的多项式ax
2+2xy-x与3x
2-
bxy+3y的差不含二次项,则a
2-2b=
.
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