原式=-2y²+(-2xy-5xy)+(6-6)
=-2y²-7xy
一道計(jì)算題 要合并同類項(xiàng)
一道計(jì)算題 要合并同類項(xiàng)
-2xy+6-2y²-5xy-6
-2xy+6-2y²-5xy-6
數(shù)學(xué)人氣:296 ℃時(shí)間:2019-10-30 23:57:17
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