Question

Correct answer with explaination will be mark as brainlist answer!!!!
(note:- don't need to do c, d and f) ​

Answer 1

Step-by-step explanation:

a) (7x+1)^2

= 49x2+ 1 +14x

b)(5x-3)^2

= 25x2 + 9 - 15x

e) (x-y)^2 - (x+y)^2

x2 +y2- 2xy - (x2+y2+ 2xy)

x2+y2 -2xy - x2 -y2 - 2xy

= -4xy