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9.6 ???????? ???? ( ? ) 1 ??

9.6 ???????? ???? ( ? ) 1 ??. ????. ???????????? (a+b)(a-b)=a2-b2 ???????? a2-b2 = (a+b)(a-b) 2 ?????????? x2-25. a2-b2 = (a+b)(a-b) ?????????????? ??? ????????????????????????. ???. 4. (1)a2-16=a2-( )2 =(a+ )(a- ) (2)64-b2=( )2-b2 =( +b)( -b)

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X2 25 - PowerPoint PPT Presentation

9.6 ???????? ???? ( ? ) 1 ??