Question

calcule o valor de:
me ajudem por favor​

Answer 1

$X=\frac{-1}{27}+[3^{-1}-(-3)^{-1} ]^{-2} \\X=\frac{-1}{27}+[\frac{1}{3}-\frac{1}{-3}]^{-2}\\ X=\frac{-1}{27}+[\frac{1}{3}+\frac{1}{3}]^{-2} \\X=\frac{-1}{27}+\frac{1}{(\frac{2}{3})^{2} } \\ X=\frac{-1}{27}+ \frac{9}{4} \\ X=\frac{239}{108}$

B) $Y=-15$