Factorise 216x^3-729y^3
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216x³ - 729y³
= (6x)³ - (9y)³
we know , formula,
a³ - b³ = (a - b)(a² + ab + b²)
use this here,
(6x)³ - (9y)³
=(6x - 9y){36x² + 81y² +54xy }
hence ( 6x - 9y) and (36x² + 81y² +54xy) are the factors of 216x³ - 729y³
= (6x)³ - (9y)³
we know , formula,
a³ - b³ = (a - b)(a² + ab + b²)
use this here,
(6x)³ - (9y)³
=(6x - 9y){36x² + 81y² +54xy }
hence ( 6x - 9y) and (36x² + 81y² +54xy) are the factors of 216x³ - 729y³
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