Ответ:
Объяснение:
49х^2-1 = (7х)^2 - 1^2 = (7х - 1)(7х + 1)
25-9х^2 = 5^2 - (3х)^2 = (5 - 3х)(5 + 3х)
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Ответ:
Объяснение:
49х^2-1 = (7х)^2 - 1^2 = (7х - 1)(7х + 1)
25-9х^2 = 5^2 - (3х)^2 = (5 - 3х)(5 + 3х)