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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)`1. 8 xx 2.2`
(ii) `9. 8 xx 10.2`

Text Solution

Verified by Experts

Given:
` (i) 1. 8 xx 2.2`
`=> (2-0.2) (2+0.2)`
`=> (2)^2-(0.2)^2`
`=> 4-0.04`
`=> 3.96`
(ii) `9. 8 xx 10.2` `=> (10-0.2) (10+0.2)`
...
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