rapbot36p0im0p rapbot36p0im0p
  • 01-05-2018
  • Mathematics
contestada

Help please!
6x^2+2x-9=0
A 6.4, -8.4
B 1.1, -1.4
C -2.2, 2.8
D -1.1, -1.4

Respuesta :

gmany
gmany gmany
  • 02-05-2018
[tex]6x^2+2x-9=0\\\\a=6;\ b=2;\ c=-9\\\\\Delta=b^2-4ac\to\Delta=2^2-4\cdot6\cdot(-9)=220\\\\x_1=\dfrac{-b-\sqrt\Delta}{2a};\ x_2=\dfrac{-b+\sqrt\Delta}{2a}\\\\x_1=\dfrac{-2-\sqrt{220}}{2\cdot6}=\dfrac{-2-\sqrt{220}}{12}\approx-1.4\\\\x_2=\dfrac{-2+\sqrt{220}}{2\cdot6}=\dfrac{-2+\sqrt{220}}{12}\approx1.1[/tex]

Answer: B. 1.1; -1.4.
Answer Link

Otras preguntas

Describe the relationship between Avogadro's number and one mole of any substance.
What two forces affect the level of an objects acceleration?
Look Down Below For question:
What Is a word that is to change your beliefs. 7 letters. C as the first letter and e as the fith.
Which of the following was true of Nixon's presidency? A. It oversaw the establishment of the Environmental Protection Agency. B. It tried to overthrow Johns
$970 at 4 1/4% simple interest for 2 years
Which of the following was not a goal of the new United Nations? (Points : 2) to prevent war and international conflict to promote cooperation among nations to
What two forces affect the level of an objects acceleration?
What does ¿El Día San Valentín es el trece de enero? Mean
what is 7.5 cm in inches