Maharashtra State BoardSSC (English Medium) 8th Standard
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Expand (7x − 9y)3 - Mathematics

Sum

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(7x − 9y)3

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Solution

(7x − 9y)3

= `(7x)^3 - (9y)^3 - 3 xx (7x)^2 xx 9y + 3 xx 7x xx (9y)^2`

= `343x^3 - 729y^2 - 1323x^2y + 1701xy^2`

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APPEARS IN

Balbharati Mathematics 8th Standard Maharashtra State Board
Chapter 5 Expansion formulae
Practice Set 5.3 | Q 1.3 | Page 27
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