Question

Using identities evaluate:

a) 103²
b) 198×202​

Answer 1

Answer:

a) 103²

= (100+3)²

= 100² + 3² +2x100x3

= 10000 + 9 + 600

= 10609

b) 198x202

= (200-2) (200+2)

= 200² - 2²

= 40000 - 4

= 39996

Step-by-step explanation:

a) Identity used :- (a+b) ²

b) Identity used :- (a+b) (a-b)

Answer 2

Answer:

(198*202)

(200-2)(200+2)

i.e..(200^2-2^2)//

I hope It will help you pls mark me as brainleast