Exemplar Exercise Problems XXIX — task. Mathematics CBSE, Class 9.

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Simplify \((2x – 5y)^3 – (2x + 5y)^3\).

Ans:

\( 250xy^3 – 120x^2\)
\( 50y^3 +20x^2y\)
\(50xy^3 +30x^2y\)
\( – 250y^3 – 120x^2y\)

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