计算(因式分解):(2a-b﹚²-(3a+b)²
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计算(因式分解):(2a-b﹚²-(3a+b)²
计算(因式分解):(2a-b﹚²-(3a+b)²
计算(因式分解):(2a-b﹚²-(3a+b)²
(2a-b)²-(3a+b)²
=[(2a-b)+(3a+b)][(2a-b)-(3a+b)]
=5a(-a-2b)
=-5a(a+2b)