Factorise :-
125x^3 - 729y^3
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Answer:
(5x-9y) (25x²+45xy+81y²)
Step-by-step explanation:
125x³ - 729y³
= (5x)³ - (9y)³
a³-b³ = (a-b) (a²+ab+b²)
so (5x)³ - (9y)³ = (5x-9y) ((5x)²+(5x)(9y)+(9y)²)
= (5x-9y) (25x²+45xy+81y²)
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Answer:
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