Espero que te ayude.
Explicación paso a paso:
1. ( x + 2 )³
= ( x + 2) ( x + 2 ) ( x + 2 )
= x³ + 6x² + 12x + 8
2.- ( 2x + 3 )³
= - ( 2x + 3 ) ( 2x + 3 ) ( 2x + 3 )
= - ( 8x³ + 36x² + 54x + 27 )
= - 8x³ - 36x² - 54x - 27
3.- ( 3x - 1 )³
= - ( 3x - 1 ) ( 3x - 1 ) ( 3x - 1 )
= - ( 27x³ - 27x² + 9x - 1 )
= - 27x³ + 27x² - 9x + 1
4.- ( 7x - 5y )³
= - ( 7x - 5y ) ( 7x -5y ) ( 7x - 5y )
= - ( 343x³- 735x²y + 525xy²- 125y³ )
= - 343x³ + 735x²y - 525xy² + 125y³
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Espero que te ayude.
Explicación paso a paso:
1. ( x + 2 )³
= ( x + 2) ( x + 2 ) ( x + 2 )
= x³ + 6x² + 12x + 8
2.- ( 2x + 3 )³
= - ( 2x + 3 ) ( 2x + 3 ) ( 2x + 3 )
= - ( 8x³ + 36x² + 54x + 27 )
= - 8x³ - 36x² - 54x - 27
3.- ( 3x - 1 )³
= - ( 3x - 1 ) ( 3x - 1 ) ( 3x - 1 )
= - ( 27x³ - 27x² + 9x - 1 )
= - 27x³ + 27x² - 9x + 1
4.- ( 7x - 5y )³
= - ( 7x - 5y ) ( 7x -5y ) ( 7x - 5y )
= - ( 343x³- 735x²y + 525xy²- 125y³ )
= - 343x³ + 735x²y - 525xy² + 125y³