化简 (2a+3b-c)²-(3a-2b+c)²
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化简(2a+3b-c)²-(3a-2b+c)²化简(2a+3b-c)²-(3a-2b+c)²化简(2a+3b-c)²-(3a-2b+c)²(
化简 (2a+3b-c)²-(3a-2b+c)²
化简 (2a+3b-c)²-(3a-2b+c)²
化简 (2a+3b-c)²-(3a-2b+c)²
(2a+3b-c)²-(3a-2b+c)²
=[(2a+3b-c)+(3a-2b+c)]*[(2a+3b-c)-(3a-2b+c)]
=(5a+b)(-a+5b-2c)=-5a²+5b²+24ab-2bc-10ac
-5a²+5b²+24ab-2bc-10ac