Simplify the following using the identities:
(i) `(58^2-42^2)/(16)`
(ii) `178\ xx\ 178\ -22\ xx\ 22`

Explanation

Given:

`(i) (58^2-42^2)/(16)`

Using identity, `a^2-b^2=(a-b)(a+b)`

`=> (3364-1764)/(16)`

`=> (1600)/(16)`

`=> 100`

`(ii)178\ xx\ 178\ -22\ xx\ 22`

`=> 31684 -484`

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