Question

expand 58² by using formula :(a-b)²=a²2ab+b²

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Answer 1

Answer:

( 60 - 2) square

(60)square + 2 * 60 * 2 -(2) square

3600 + 240 - 4

3836

Answer 2

Question - 58²

Formula - (a-b)²=a²-2ab+b²

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Answer -

Expanding 58² = (50 + 8)²

Using the formula - (a-b)²=a²-2ab+b²

- 50²-2(50)(8)+8²

- 2500 - 2(400) + 64

- 2500 - 800 + 64

- 1,764

Hence, 1764 is the answer.

Hope helps....