Question

Evaluate using suitable identity:c). 98²​

Answer 1

The answer is 98 x 98 =9604

Answer 2

Step-by-step explanation:

★ Solution :-

$\sf \longmapsto 98^2$

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

Here,

• a = 100
• b = 2

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

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

$\sf \longmapsto 10000 - 400 + 4$

$\sf \longmapsto 9606$