Question

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

Answer 1

Step-by-step explanation:

★ Solution :-

$\sf \longmapsto 102 \times 98$

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

Here,

• a = 100
• b = 2

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

$\sf \longmapsto 100^2 - 2^2$

$\sf \longmapsto 10000 - 4$

$\sf \longmapsto 9996$

Answer 2

Answer:

9996

Step-by-step explanation:

Algebraic Identity: (a-b)(a+b)=a²-b²

102×98=(100+2)(100-2)

=100²-2²

=10000-4

=9996