Question

Помогите решить
задали на зимние каникулы
(b+3)(b-3)=
(2c-1)(2c+1)=
(7p+3)(7p-3)=
(3-1/5a)(3+1/5a)=
(2-x)(2+x)=
(k-y)(k+y)=
(x-3y)(x-3y)=
(2a-b)(2a+b)=
(8x+4a)(8x-4a)=
(10a-b)(b+10a)=
(y+4)(4-y)=
(5b+1)(1-5b)=

Answer 1

b²-9
4c²-1
49p²-9
9-1/25a²
4-x²
k²-y²
x²-9y²
4a²-b²
64x²-16a²
100a²-b²
16-y²
1-25b²