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Question
Factorize each of the following expression:
3x3y − 243xy3
Solution
\[3 x^3 y - 243x y^3 \]
\[ = 3xy( x^2 - 81 y^2 )\]
\[ = 3xy[ x^2 - (9y )^2 ]\]
\[ = 3xy(x - 9y)(x + 9y)\]
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