factorise 1331 x³ - 343 y³
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Step-by-step explanation:
1331x^2-343y^3
(11x)^3-(7y)^3
this implies (11x-7y){(11x)^2+(7y)^2+11x×7y}
(11x-7y)(121x^2+49y^2+77xy)
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