Ответ:
=25х²+45ху-45ху-81у²-25х²= -81у²
т.к. у=0.01
-81·0.01²=-0.0081
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Ответ:
=25х²+45ху-45ху-81у²-25х²= -81у²
т.к. у=0.01
-81·0.01²=-0.0081