Question

(2x+6y)(2x-6y)
(6x-2y)(2y+6x)
(2xy-6y)(6y+2xy)
(6xy-2y)(2y+6xy)
помогите пж​

Answer 1

Теория:

${a}^{2} - {b}^{2} = (a - b)(a + b)$

Решение:

(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