A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 4 years ago
Need help on Quadratic equations please!
The equation is on the comments.
anonymous
 4 years ago
Need help on Quadratic equations please! The equation is on the comments.

This Question is Closed

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\[4x^{2}+9x=0\] i know that the answer is: \[x=\frac{ 9\pm \sqrt{814(4)(2)} }{ 8 }\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Much easier to solve your problem would be to factor out an x,\[x(4x+9)=0\]now you have two solutions,\[x=0\]and\[4x+9=0\]\[4x=9\]\[x=\frac{9}{4}\]and you get

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0The equation is correct. But you put innocent "2" instead of "0" for c.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0huh? the thing messed up, give me a sec

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Well, then you can do the following:\[x_{1/2}=\frac{9 \pm \sqrt{9^24*4*0}}{2*4}\]simplifying that you get,\[x_{1/2}=\frac{ 9 \pm 9 }{ 8 }\]Compute the rest

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I have to use: \[ax^{2}+bx+c=0\] and i have to use: \[x=\frac{ b\pm \sqrt{b^{2}4ac} }{ 2a }\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Yes.. that is what I have used. Just make c=0, and you will get the same result as I have.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0but c = 2... thats what the answer says.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Well then you have given us a wrong problem\[4x^2+9x=0\]does not have a c in it..

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0my bad... /facepalm its: \[4x^{2}+9x+2=0\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Hehe, no worries. Now you have to use the formula you input\[x_{1/2}=\frac{9 \pm \sqrt{9^24*4*2}}{2*4}\]compute the values inside the square root first\[x_{1/2}=\frac{9 \pm \sqrt{81 32}}{8}\]and complete calculation\[x_{1/2}=\frac{9 \pm 7}{8}\] and you get,\[x_1= 2\]\[x_2=\frac{1}{4}\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0where did you get \[x _{1/2} \]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0That just means that there are two solutions we will get from the equation. Its just mathematical notation. I am used to writing it like that. Don't worry, you can write just x, it will be fine.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0im only in high school. :/ :L

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Yeah I figured. The quadratic equations are studied extensively in high school. You're doing good tho. Might want to reconsider your profile picture heh ;)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0it says i don't hate math. open my profile and look at the white! everyone says that. lol do you not see the white scribble on the \[^{don't}\] I hate math

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Oh.. then I owe you an apology. XD.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Its okay. I need to make it bigger anyway. lol. Thanks tho.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0You're welcome man. Anytime!

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I gave you a medal. dont for get to give one back~ ;)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Hey, my bad, my first day over here.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0This is my first day in open study, so I'm still getting used to the medals and stuff.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0how would i set up: \[3x^{2}+11x+5=0\] and oh. i didn't know

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Same principle, replace a=3, b=11, and c=5.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0i mean in the fraction form
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.