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Simplify the following using the formula...

Simplify the following using the formula: `(a-b)(a+b)=a^2-b^2:`
(i)`(79)^2-(69)^2`
(ii) `197 xx 203`

Text Solution

Verified by Experts

Given:
`(i) (79)^2-(69)^2`
`=> (79-69)(79+69)`
`=>10xx48`
`=>1480`
`(ii) 197\ xx\ 203`
`=> (200-3)(200+3)`
`=> (200)^2-(3)^2`
...
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