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Question

Aptitude Questions:

 

 

 

If m = -4, n = -2, then the value of m3 – 3m2 + 3m + 3n + 3n2 + n3  is _______

  • -124
  • 126
  • 124
  • -126
  • None of these
Answer- D

Given values m= -4, n= -2

m3 – 3m2 + 3m + 3n + 3n2 + n3, after substitution

(-4)3 - 3 (-4)2 + 3 (-4) + 3 (-2) + 3 (-2)2 + (-2)3

=> -64 – 3 (16) + 3 (-6) + 3 (4) + (-8)

=>-64 – 48 – 18 + 12 – 8

=> -64 – 48 – 14 => -126

Hence correct answer is -126.


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