1) 15a^2/3a-2-5a/1 2) 6c^2/3+2c-3c/1 3) 2y^2/y-8-2y/1 4) 9a/a+3-3a/1 5) 5a/1-3+5a^2/a+1 6) 4c/1-4c^2-2c/2+c 7) 2c/1-2c^2-18/c+3 8) 4a/1-4a^2-36/a+3 в заранее ; 3
235
371
Ответы на вопрос:
(2m - 3n)*( 5m + n ) - 10 * ( m + n )^2 = 10m^2 + 2mn - 15mn - 3n^2 - - 10 * ( m^2 + 2mn + n^2 ) = 10m^2 - 13mn - 3n^2 - 10m^2 - 20mn - 10n^2 = = - 13n^2 - 33mn
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