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2xy - PowerPoint PPT Presentation

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??????. A. A. A. ?? < 0 ??? :. ?? , ?? A ,B ???? , ? B ?????. 4. ?? > 0 ??? :. B. B. B. ?????. 1. ????? :. 2. ?? ? ????? :. B?0. B = 0. ?? ? ????? :. 3. ???? 0 ??? :. A=0 ? B ?0. A>0 ,B>0 ? A<0, B<0. A>0 ,B<0 ? A<0 ,B>0. 2x. X+1.

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414 views • 30 slides

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??????. ????. ??????????????????? ???? ?. ?? ????? ???????. ????????. (l) ?????????? (2) ?????????? (3) ???????????????. ????????????. ??????????????. ??????????????? ? (1)3x 2 y-xy+y=y(3x 2 -x) ? (2)x 2 -2x+3=(x-1) 2 +2 ? (3)x 2 y 2 +2xy-1=(xy+1)(xy-1) ?

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676 views • 25 slides

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2xy - PowerPoint PPT Presentation

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