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

who first applied science to dental treatment
Convert 74.69 to expanded form
What are some of the changes in the way people live in the United States now compared to a hundred years ago
A way of showing the round earth on a flat map
How do add pictures on here
You are asked to find the mean of the data shown in the stem-and-leaf plot. Which tools are appropriate? Choose exactly two answers that are correct. a. protra
Who was responsible for inventing and perfecting a movable type printing press?
Which aspect of the government formed under the Articles of Confederation was best highlighted by Shays’s Rebellion?
Please Help!!! A gym teacher orders 42 tennis balls. Each package contains 3 tennis balls. Which of the following equations represents the number (x) of package
Write a sentence about animals that includes two common nouns