Question

Evaluate the following

Answer 1

Hey mate!!

we will use identity

${x}^{2} - {y}^{2} = (x + y)(x - y)$

${428}^{2} - {427}^{2} \\ (428 + 427)(428 - 427) \\ 855$

Hope it helps u dear✌️✌️

Answer 2

Answer:

Evaluate:-

428^2-427^2

Here your answer is⬇️

we know that ,

a^2-b^2=(a+b)(a-b)

=(428+427)(428-427)

=855.

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