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To determine if the expression (25x^2 - 30xy - 9y^2) is a perfect square, we can check if it can be factored into the form ((ax + by)^2). However, calculating the discriminant of the corresponding quadratic in terms of (y) shows that it is negative, indicating that it cannot be factored into real linear factors. Therefore, (25x^2 - 30xy - 9y^2) is not a perfect square.

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6mo ago

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