Question

(5a-3)^2=
(12+4x)^2=
(6x+y)(6x-y)=
64^2-169y^4=

помогите пж

Answer 1

1) 25a^2-30a+9
2) 144+96x+16x^2
3)36x^2-y^2
4)(64+13y^2)(64-13y^2)