SSC (English Medium) Class 8Maharashtra State Board
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# Expand. ( X + 1 X ) ( X − 1 X ) - SSC (English Medium) Class 8 - Mathematics

ConceptExpansion of (X + A) (X + B)

#### Question

Expand.

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

#### 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

Is there an error in this question or solution?

#### APPEARS IN

Balbharati Solution for Balbharati Class 8 Mathematics (2019 to Current)
Chapter 5: Expansion formulae
Practice Set 5.1 | Q: 8 | Page no. 24
Solution Expand. ( X + 1 X ) ( X − 1 X ) Concept: Expansion of (X + A) (X + B).
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