Question

Evaluate by using suitable identity

(i) (20 + 8) (20 - 8) ​

Answer 1

Answer:

20(8+(-8). 20 (8- 8). 20

Answer 2

Answer:

336

Explanation:

Using the identity (x+a)(x-a)= x^2 - a^2

= 20^2 - 8^2

= 400 - 64

= 336

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