Question

Find the product of $102\times 98$ using appropriate identity

• A. $9996$
• B. $9906$
• C. $8996$
• D. $8096$

Answer 1

The correct option is A $9996$

We know $102\times 98$ $=$ $(100+2)(100-2)$

Using identity $(x+y)(x-y)=x^2-y^2$

Therefore, $(100+2)(100-2)$ $=(100{)}^2-(2{)}^2$

$=10000-4$

$=9996$