Автор - doncovas35
Ответ:
В таких скобках [2] степень
Пошаговое объяснение:
(2а+3)(2а-3)=4а[2]-9
(7+2у)(7-2у)=49-4у[2]
(аб-ху)(ху+аб)=а[2]б[2]-х[2]у[2]
(4х-3у)(4х+3у)=16х[2]-9у[2]
(5a-8b)(5a+8b)=25а[2]-64b[2]
(3x-y)(3x+y)=9х[2]-у[2]
(5m-2n)(5m-2n)=25m[2]-4n[2]
(6a-b)(6a+b)=36a[2]- b[2]
(9b+7c)(9b-7c)=81b[2]-49с[2]
(c+13)(13-c)=169-c[2]
(2x-15)(15+2x)=4x[2]-225