Question

Evaluate 98square by using the identity (a-b)a square-2ab + b square

Answer 1

Answer:

9604

Step-by-step explanation:

We can write 98 as (100 - 2)

using the identity

$(a - b) {}^{2} = a {}^{2} - 2ab + b {}^{2}$

$100 {}^{2} - 2 \times 100 \times 2 + 2 {}^{2}$

=10000 - 400 + 4

= 10000 - 396

= 9604

Hope this will help you