Question

using identities find the value of (128)^2 _(127)^2​

Answer 1

Hope this will help you..

Answer 2

(128)² - (127)²

Using the identity,

a² - b² = (a-b) (a+b)

Solution:

(128)² - (127)²

= (128 - 127) (128 + 127)

= (1) (255)

= 255

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