Question

8. Show that :
(a) (2x - 7y)2 + 28xy = 4x2 + 49y2
(b) (3xy - 7yz)2 + 84xy2z = (3xy + 7yz)2
(c) (4x + 5y)2 – (4x - 5y)2 = 80xy​

Answer 1

are bhai bahut hard question hai kahan se milaa