Разложи на множители 49x^2 - 64y^2 = (8x - 8y)(8x + 8y) (7x - 8y)(7x + 8y) (7x - 9y)(7x + 9y) невозможно разложить x^2 - 25y^2 = (x - 5y)(x + 5y) (x - 25y)(x + 25y) (x - 5y)(x - 25y) невозможно разложить x^2 + 16 = (8x - 8y)(8x + 8y) (x - 4)(x + 4) (x