2mn﹙2b-a²﹚+3m²n﹙a²-2b﹚
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2mn﹙2b-a²﹚+3m²n﹙a²-2b﹚2mn﹙2b-a²﹚+3m²n﹙a²-2b﹚2mn﹙2b-a²﹚+3m²n﹙
2mn﹙2b-a²﹚+3m²n﹙a²-2b﹚
2mn﹙2b-a²﹚+3m²n﹙a²-2b﹚
2mn﹙2b-a²﹚+3m²n﹙a²-2b﹚
是不是化简呢?如果是求值,条件不够呢
化简的话,步骤如下
原式=2mn﹙2b-a²﹚+3m²n﹙a²-2b﹚
=-(2b-a²)3m²n+2mn﹙2b-a²﹚
=(2b-a²)(2mn-3m²n)
=mn(2b-a²)(2-3m)
欢迎追问~