Question

(78)×(82) find the value

Answer 1

Here is your answer friend,
(78)×(82)
=78×82
=6396
Other type?
Refer to the attachment

Hope it's useful and helpful!!!
@#shakti37

Answer 2

(80-2)(80+2)
(a+b)(a-b)=a sq-b sq
=6400-4=6396