Question

Using identities, evaluate (i) 5.22

(ii) 297 × 303

Answer 1

Mark this answer as brainliest answer

Answer 2

Given:

297 x 303

To find:

Solve the given multiplication by using identities

Solution:

297 x 303

=> we can write 297 as 300 - 3 and 303 as 300 + 3

$= > 297 \times 303$

$= > (300 - 3)(300 + 3)$

=> Using identity:

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

$= > {300}^{2} - {3}^{2}$

$= > 90000 - 9$

$= > 89991$

Hence, the required answer is 89991