factorise 2 x cube + 54
Answers
Answered by
15
2x³ + 54
= 2 ( x³ + 27 )
We know that,
a³ + b³ = (a + b) ( a² - ab+b²)
= 2 ( x + 3 ) ( x² - 3x + 9 )
Hope helped!
= 2 ( x³ + 27 )
We know that,
a³ + b³ = (a + b) ( a² - ab+b²)
= 2 ( x + 3 ) ( x² - 3x + 9 )
Hope helped!
Answered by
14
heya..!!!!
we know that:-
(a ³ + b³) = (a + b)(a² + b² - ab)-----(1)
2x³ + 54
=> 2(x³ + 27)
=> 2(x³ + 3³)
=> 2(x + 3)(x² + 9 - 3x)--------from (1)
we know that:-
(a ³ + b³) = (a + b)(a² + b² - ab)-----(1)
2x³ + 54
=> 2(x³ + 27)
=> 2(x³ + 3³)
=> 2(x + 3)(x² + 9 - 3x)--------from (1)
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