MariH MariH
  • 03-05-2014
  • Mathematics
contestada

solve for x: 2x^2+4x-16+=0

Respuesta :

marmal
marmal marmal
  • 03-05-2014
[tex]2x^2+4x-16=0|:2\\ x^2+2x-8=0\\ \Delta=36\Rightarrow\sqrt{\Delta}=6\\ x_1=\frac{-b+\sqrt{\Delta}}{2a}\ \vee\ x_=\frac{-b-\sqrt{\Delta}}{2a}\\ x_1=2\ \vee\ x_2=-4[/tex]
Answer Link
kate200468
kate200468 kate200468
  • 03-05-2014
[tex]2x^2+4x-16=0\ /:2\\ \\x^2+2x-8=0\\ \\x^2-2x+4x-8=0\\ \\x(x-2)+4(x-2)=0\\ \\(x-2)(x+4)=0\ \ \ \Leftrightarrow\ \ \ x-2=0\ \ \ \vee\ \ \ x+4=0\\ \\.\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x=2\ \ \ \ \ \ \ \ \ \ \ \ \ \ x=-4[/tex]
Answer Link

Otras preguntas

Which of these is not a power of the president? make laws veto laws oversee the military make official appointments
using kepler's 3rd law and newton's law of universal gravitation, find the period of revolution p of the planet as it moves around the sun. assume that the mass
difference between their and there
What is the potential of a 35kg child sitting at the top of a slide that is 3.5m above the ground? What is her kinetic energy if she moves down the slide at a s
similarities between dna and rna
Fill in the blank: After laboring for seven years, the group produced one of the great works of English literature. _________________ has been called “the only
advantages and disadvantages of nuclear energy
who were the first europeans to master fireworks
map of european countries
calcule: a)(+17)+(-8)+(+19)+(-26)+(+1)=