Question

Preciso dos cálculos!!!!

Answer 1

12)

$\frac{4}{6} = \frac{x}{5} \\ 6x = 20 \\ x = \frac{20}{6} = \frac{10}{3}$

13)

x²-5x+10<0

∆=25-40=-15<0

S=∅

14) sim pois a=5>0