Question

Помогите алгебра
Задание 31.4

Answer 1

1)(с-0.7)(с+0.7)
2)(4-k)(4+k)
3)(20-m)(20+m)
4)(t-15)(t+15)
5)(1.3-b)(1.3+b)
6)(y-2/3)(y+2/3)
7)(5x-2)(5x+2)
8)(5/6-8y)(5/6+8y)