Question

simplify using identities 178 x 178 - 22 x 22

Answer 1

31200
as identity (A)square - (B) square=(A+B) (A-B)

Answer 2

178×178-22×22= a2-b2=(a+b)(a-b)
so equation will be .....
(178)2-(22)2=(178+22)(178-22)
200×156
=31200

here "a2"means that "a"power to 2

I hope this will help