Maharashtra State BoardSSC (English Medium) 8th Standard
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Expand. ( X + 1 X ) ( X − 1 X ) - Mathematics

Sum

Expand.

`(x+1/x)(x-1/x)`

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Solution

`(x+1/x)(x-1/x)`

= `(x)^2 + {1/x + (-1/x)}x + (1/x) xx (-1/x)`

= `x^2 + (1/x - 1/x)x - 1/x^2`

= `x^2 - 1/x^2`

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APPEARS IN

Balbharati Mathematics 8th Standard Maharashtra State Board
Chapter 5 Expansion formulae
Practice Set 5.1 | Q 8 | Page 24
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