Is 25x2 30xy-9y2 a perfect square?

Answer 1

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.