计算(a2+3)(a-2)-a(a2-2a-2)
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计算(a2+3)(a-2)-a(a2-2a-2)
计算(a2+3)(a-2)-a(a2-2a-2)
计算(a2+3)(a-2)-a(a2-2a-2)
(a²+3)(a-2)-a(a²-2a-2)
=a³-2a²+3a-6-a³+2a²+2a
=5a-6
一楼正解
等于5a-6
计算(a2+3)(a-2)-a(a2-2a-2)
计算(a2+3)(a-2)-a(a2-2a-2)
计算(a2+3)(a-2)-a(a2-2a-2)
(a²+3)(a-2)-a(a²-2a-2)
=a³-2a²+3a-6-a³+2a²+2a
=5a-6
一楼正解
等于5a-6