Question

simplificando a expressão (-5)² -3² + (2/3)°/ 3-²+ 1/5+1/2 obtemos:
a) 3150/17
b) 90
c) 1530/73
d) 17/3150
e) -90

Answer 1

$\frac{( - 5 {)}^{2} - {3}^{2} + ( \frac{2}{3} {)}^{0} }{ {3}^{ - 2} + \frac{1}{5} + \frac{1}{2} } \\ \\ \frac{25 - 9 + 1 }{ \frac{1}{ {3}^{2} } + \frac{7}{10} } \\ \\ \frac{17}{ \frac{1}{9} + \frac{7}{10} } \\ \\ \frac{73}{ \frac{73}{90} } \\ \\ \frac{1530}{73}$

C)