(x –y)(x +y)
(2x – 1)(2x+1)
(8c + 9d)(8c – 9d)
(1 – 3k)(1 +3k)
(p – q)(p +q)
(7+3y)(7-3y)
(8b+5a)(5a – 8b)
(5x-10y)(5x+10y)
(p-5)(p+5)
(m-3n)(3n+m)
(7x-2)(2+7x)
(2m+n)(2m-n)
Помогите пожалуйста