Question

simplify the following using identities
a. (200)²-(100)²

Answer 1

(200+100)(200-100)
is the answer

Answer 2

Using identify a2-b2 = ( a+b)(a-b)

a = 200 and b = 100

(200)2-(100)2 = (200+100)(200-100)

= 300*100

= 30000

Answer = 30000