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The expression (9y^2 - 49) is a difference of squares, which can be factored using the formula (a^2 - b^2 = (a - b)(a + b)). Here, (9y^2) is ( (3y)^2) and (49) is (7^2). Therefore, the factored form is ((3y - 7)(3y + 7)).

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2w ago

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