Ответ:
(x+7)(7-x) = -x^2 - 49
(5a-8b)(5a+8b) = 25a^2 - 64b^2
(8m+2)(2-8m) = -64m^2 - 12m + 4
(13c-14d)(14d+13c) = 169c^2 - 196d^2
Объяснение:
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Ответ:
(x+7)(7-x) = -x^2 - 49
(5a-8b)(5a+8b) = 25a^2 - 64b^2
(8m+2)(2-8m) = -64m^2 - 12m + 4
(13c-14d)(14d+13c) = 169c^2 - 196d^2
Объяснение: