Теория:
(2x + 6y)(2x - 6y) = 4x^2 - 36y^2
(6x - 2y)(6x + 2y) = 36x^2 - 4y^2
(2xy - 6y)(2xy + 6y) = 4x^2y^2 - 36y^2
(6xy - 2y)(6xy + 2y) = 36x^2y^2 - 4y^2
Теория:
(2x + 6y)(2x - 6y) = 4x^2 - 36y^2
(6x - 2y)(6x + 2y) = 36x^2 - 4y^2
(2xy - 6y)(2xy + 6y) = 4x^2y^2 - 36y^2
(6xy - 2y)(6xy + 2y) = 36x^2y^2 - 4y^2