The correct option is B (2x 7y) (4x2 + 14xy + 49y2)Use a3 b3 formula and substitute a = 2x and b = 7y 8x3 343y3 = (2x)3 (7y)3 = (2x 7y) (4x2 + 14xy + ...

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Byju's Answer

Standard IX

Mathematics

Addition of Polynomials

8 x3-343 y3=?

Question

8x³ - 343y³= ?

(2x - 7y) (4x² - 49y²)

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(2x+7y)(4x² - 14xy + 49y²)

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(2x + 7y) (2x - 7y)

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(2x-7y) (4x² + 14xy + 49y²)

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Solution

The correct option is D
(2x-7y) (4x² + 14xy + 49y²)

Use a³- b³ formula and substitute a = 2x and b = 7y

8x³- 343y³ = (2x)³- (7y)³= (2x - 7y) (4x² + 14xy + 49y²)

Suggest Corrections

8x3 - 343y3 = ?

The correct option is D (2x-7y) (4x2 + 14xy + 49y2)Use a3 - b3 formula and substitute a = 2x and b = 7y 8x3 - 343y3 = (2x)3 - (7y)3 = (2x - 7y) (4x2 + 14xy + 49y2)

8x³ - 343y³= ?

The correct option is D
(2x-7y) (4x² + 14xy + 49y²)

Use a³- b³ formula and substitute a = 2x and b = 7y

8x³- 343y³ = (2x)³- (7y)³= (2x - 7y) (4x² + 14xy + 49y²)