(a+3)(a-1)+a(a+2)化简计算,

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(a+3)(a-1)+a(a+2)化简计算,(a+3)(a-1)+a(a+2)化简计算,(a+3)(a-1)+a(a+2)化简计算,(a+3)(a-1)+a(a+2)=a²+2a-3+a&#

(a+3)(a-1)+a(a+2)化简计算,
(a+3)(a-1)+a(a+2)化简计算,

(a+3)(a-1)+a(a+2)化简计算,
(a+3)(a-1)+a(a+2)
=a²+2a-3+a²+2a
=2a²+4a-3
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:(a+1)×(a+3)-(a-1)×(a+2)=
=a²+3a+a+3-﹙a²+2a-a-2﹚
=a²+4a+3-a²-a+2
=3a+5