Question

me ajudem plss
questões 15 e 16​

Answer 1

15.

$x^{3}$ + 2$x^{2}$ - $\frac{x}{2}$ +2 =

$2^{3}$ + 2*$2^{2}$ - $\frac{2}{2}$ + 2

= 8 + 2*4 -1 +2

= 8 + 8 -1 +2

= 17     Opção d

16.

$\frac{5m}{3}$ + $\frac{1*m^{2} }{6}$ - $\frac{1*m}{3}$ =

= $\frac{5*2}{3}$ + $\frac{1*2^{2} }{6}$ - $\frac{1*2}{3}$

= $\frac{10}{3}$ + $\frac{4}{6}$ - $\frac{2}{3}$

= $\frac{20}{6}$ + $\frac{4}{6}$ - $\frac{4}{6}$

= $\frac{20+4-4}{6}$

=  $\frac{20}{6}$ = $\frac{10}{3}$      Opção c