Maharashtra State BoardSSC (English Medium) 8th Standard
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Expand. (13+X)(13−X) - Mathematics

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Sum

Expand.

(13+x) (13−x)

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Solution

(13+x) (13−x)

= -[(x+ 13)(x - 13)]

= - [(x)2 + {13 + (-13)}x + (13) × (-13)]

= -[x2 + (13-13)x - 169)]

= -[x2 - 169]

= 169 - x2

Concept: Expansion of (x + a)(x + b)
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APPEARS IN

Balbharati Mathematics 8th Standard Maharashtra State Board
Chapter 5 Expansion formulae
Practice Set 5.1 | Q 4 | Page 24
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