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

In terms of weather, what kind of boundary does the line labeled  X represent? A. occluded front B. stationary front C. cold front D. warm front
Sue stacked one box onto another. The bottom box had the height of 2 1/3 feet and the top box had the height of 3 2/3 feet. How tall were the stacked boxes?
does a human body use neon???
Tu as quels cours le jeudi matin?
an explanation describe if an orange pet mates with another orange pet, can they have any green offspring.
Emma uses a 250 meter roll of crepe paper to make streamers. How many dekameters of creme paper does emma use?
How do you put allele in a sentence
What is the adjective in the following sentence? The yellow sun hung brightly in the sky. a. Brightly b. Sun c. Yellow d. Hung
Which word has the long i sound? relieve speciality society social
How do I factor polynomials by grouping, step by step? 4x^2 - 19x+ 12