化简:【a+b】²-c²分之a²-【b-c】²是化简
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化简:【a+b】²-c²分之a²-【b-c】²
是化简
【a+b】²-c²分之a²-【b-c】²
=a²+2ab+b²-b²+2bc-c²-a²/c²
=a²+2ab+2bc-c²-a²/c²;
-B分之B =-1
化简:【a+b】²-c²分之a²-【b-c】²
是化简
【a+b】²-c²分之a²-【b-c】²
=a²+2ab+b²-b²+2bc-c²-a²/c²
=a²+2ab+2bc-c²-a²/c²;
-B分之B =-1