Jawabanmu

2014-09-12T20:58:37+07:00
  \frac{3x^{3}-  5^{2} -12x +20 }{ x^{-4}}  = 3x^{6}-  5^{2} -12x +20 * x^4 =3x^6 - 5x^5-12x^4+20x^3Ketikkan jawabanmu di sini