Упрощение:
(3x - 4y)(3x + 4y) - (6x - 2y)(6x + 2y)= 9x^2 - 12xy + 12xy - 16y^2 - 36x^2 + 12xy + 12xy - 4y^2= 9x^2 - 16y^2 - 36x^2 - 4y^2= -27x^2 - 20y^2
Упрощение:
(3x - 4y)(3x + 4y) - (6x - 2y)(6x + 2y)
= 9x^2 - 12xy + 12xy - 16y^2 - 36x^2 + 12xy + 12xy - 4y^2
= 9x^2 - 16y^2 - 36x^2 - 4y^2
= -27x^2 - 20y^2