Question

Evaluate using suitable identity:
e). 102 × 98​

Answer 1

9996

Explanation:

Algebraic Identity: (a-b)(a+b)=a²-b²

102×98=(100+2)(100-2)

=100²-2²

=10000-4

=9996

Answer 2

Explanation:

★ Solution :-

`\sf \longmapsto 102 * 98`

`\sf \longmapsto (a + b)(a - b) = a^2 - b^2`

Here,

• a = 100
• b = 2

`\sf \longmapsto (100 + 2)(100 - 2) = 100^2 - 2^2`

`\sf \longmapsto 100^2 - 2^2`

`\sf \longmapsto 10000 - 4`

`\sf \longmapsto 9996`