rmshrestha111 rmshrestha111
  • 30-12-2020
  • Mathematics
contestada

(x + y)3 - (x - y)3 when x = 2 and y=-1​

Respuesta :

ChoiSungHyun
ChoiSungHyun ChoiSungHyun
  • 30-12-2020

Step-by-step explanation:

When x = 2 and y = -1,

(x + y)³ - (x - y)³

= (2 - 1)³ - [2 - (-1)]³

= (1)³ - (3)³

= 1 - 27

= -26.

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