Question

2x ao quadrado + x - 5 =0

Answer 1

Bom dia,

2x² +x-5=0
Δ=b²-4.a.c
a=2,b=1, c=-5
Δ=1²-4.2.-5
Δ=1+40
Δ=41

x= $\frac{-b+- \sqrt{delta} }{2.a}$


√41=aproximadamente 6,4

x1=$\frac{-1+6,4}{4}$=$\frac{5,4}{4}$=1,35


x2=$\frac{-1-6,4}{4} =$=-7,4/4=-1,85

s=(x2=-1,85, x1=1,35)