pugs1010 pugs1010
  • 07-02-2017
  • Mathematics
contestada

Which expression is a perfect cube?
a.) 12x^12 y^18
b.)12x^27 y^125
c.)64x^15 y^18
d.)64x^27 y^125

Respuesta :

z5tequ2u
z5tequ2u z5tequ2u
  • 07-02-2017
I do believe the answer is C.
Answer Link
apologiabiology
apologiabiology apologiabiology
  • 07-02-2017
perfect cube

rembmber (x^m)^n=x^(mn)
so cued would be (x^m)^3=x^(3m)
the exponents must be divisble by 3
well, all the exponents are divisble by 3 except the ones that are 125


check A and C now
see the coefients
12 is not a perfecte cube, A is wrong


answer is C
it can be written in form
(4x⁵)³+(y⁶)³
Answer Link

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