SSC (English Medium) Class 8Maharashtra State Board
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Expand (7x − 9y)3 - SSC (English Medium) Class 8 - Mathematics

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Question

Expand

(7x − 9y)3

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 Solution for Balbharati Class 8 Mathematics (2019 to Current)
Chapter 5: Expansion formulae
Practice Set 5.3 | Q: 1.3 | Page no. 27
Solution Expand (7x − 9y)3 Concept: Expansion of (A - B)3.
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