Автор - vazovikovasofia

(7х+7у)(-6х-4)-(-х+9у)(5х+1)

Ответ

Автор - nana1179
(7х+7у)(-6х-4)-(-х+9у)(5х+1)
-42х²-28х-42ху-28у-(-5х²-х+45ху+9у)
-42х²-28х-42ху-28у+5х²+х-45ху-9у
-37х²-27х-87ху-37у

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