Question

determine o valor numerico do polinomio -6x elevado a 3 y+ 2xy,para x=1sexto e y =1.

Answer 1

$-6x^3+2xy\\\\para~~~x= \dfrac{1}{6} ~~~e~~~y=1;\\\\\\ Substitua ~~os~~valores~~indicados~~para~~x~~e~~para~~y:\\\\\\ -6\left( \dfrac{1}{6} \right) ^3+2\left( \dfrac{1}{6} \right)(1)\to\\\\ -6\left( \dfrac{1}{216} \right) + \dfrac{2}{6} \to\\\\ -\dfrac{6}{216} + \dfrac{2}{6} \to\\\\ -\dfrac{1}{36} + \dfrac{1}{3} \to~~~mmc=36\\\\ \dfrac{-1+12}{36} \to\\\\ \large\boxed{~\frac{11}{36}~}$