Question

find value of 98×102 without actual multiplication​

Answer 1

let's do it

98=100-2

102=100+2

(100-2)(100+2)

100^2-2^2

10000-4

9996.answer..

hope it helps.

Answer 2

Hey there! ☺☻☺

Given,

98 × 102

We can write them as (100-2) × (100+2)

We know,

(a-b) (a+b) = a² - b²

⇒ (100 - 2) (100 + 2)

⇒ (100)² - 2²

⇒ 10000 - 4

⇒ 9996 (←Answer)