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

Nadine can send or receive a text message for 15 cents or get an unlimited number for 5 dollars. Write and solve an inequality to find how many messages she can
A pound of seedless red grapes costs $2.75. Drew must spend less than $9.35 on a bunch of seedless red grapes.Inequality:Solution:Interpretation:
How is the numeral 35.012 written in words and why
Rewrite the function c(x) =9(x+3) using the distributive property
What is Sir Francis Drake hardships
is it possible for a distance versus-time graph to be a vertical line?
How is the numeral 35.012 written in words and why
Rewrite the function c(x) =9(x+3) using the distributive property
Solving systems by elimination: 2x + 4y = -4 3x + 5y = -3 Please show me your work so I can do the rest myself. Thanks!
Why is RNA necessary to act as messenger?