Ответ:
(2х+6у)(2х-6у)=4х²-36у²
(6х-2у)(2у+6х)=36х²-4у²
(2ху-6у)(6у+2ху)=4х²у²-36у²
(6ху-2у)(2у+6ху)=36х²у²-4у²
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Ответ:
(2х+6у)(2х-6у)=4х²-36у²
(6х-2у)(2у+6х)=36х²-4у²
(2ху-6у)(6у+2ху)=4х²у²-36у²
(6ху-2у)(2у+6ху)=36х²у²-4у²