Question

Quanto é:
6 • 3-² + (- ¼) - 4

Answer 1

$6.3^{-2}+(- \frac{1}{4} )-4= \\ 6. \frac{1}{3^2} - \frac{1}{4} -4= \\ 6. \frac{1}{9} - \frac{1}{4}-4= \\ \frac{6}{1}. \frac{1}{9}- \frac{1}{4}-4= \\ \frac{6}{9}- \frac{3}{4}= \\ \frac{2}{3}- \frac{3}{4}= \\ \\ mmc(3,4)=12 \\ \\ \frac{8-9}{12} = -\frac{1}{12}$