Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing

This Question is Closed

iheartfoodBest ResponseYou've already chosen the best response.0
do u know the general form?
 one year ago

iheartfoodBest ResponseYou've already chosen the best response.0
did u need it in linear form?
 one year ago

iheartfoodBest ResponseYou've already chosen the best response.0
like the general form of a linear equation?
 one year ago

that1chickBest ResponseYou've already chosen the best response.0
just the general form of a quadratic equation
 one year ago

iheartfoodBest ResponseYou've already chosen the best response.0
okay, so u need to know the quadratic formula i believe..do u know it?
 one year ago

that1chickBest ResponseYou've already chosen the best response.0
general form> y=a(xh)^2+k
 one year ago

that1chickBest ResponseYou've already chosen the best response.0
quadratic formula> b+sqrt(b4(a)(c))/2(a)
 one year ago

that1chickBest ResponseYou've already chosen the best response.0
but how does that help convert it to general form?
 one year ago

that1chickBest ResponseYou've already chosen the best response.0
I thought it just helped find the xintercepts..
 one year ago

iheartfoodBest ResponseYou've already chosen the best response.0
if i can remember this correctly, i believe u need to first solve to get the values of a,b,c and then you just plug it into the general form... I'm not 100% sure tho... @abb0t, am i remembering this correctly? ;/
 one year ago

that1chickBest ResponseYou've already chosen the best response.0
I know how to convert it... the problem is the 2 in 2x^2
 one year ago

that1chickBest ResponseYou've already chosen the best response.0
quadratic equations
 one year ago

that1chickBest ResponseYou've already chosen the best response.0
2 in 2x^2 is the problem.... you isolate the x variables getting: y4=2x^2+6x then complete the square and balance the equation: 6/2=3 3^2=9, y4+9=2x^2+6x+9, y+5=2x^2+6x+9 then convert the trinomial into a binomial... thus lies my dilemma
 one year ago

iheartfoodBest ResponseYou've already chosen the best response.0
sorry, i'm not very sure, cuz i don't think i remember this correctly ahha and i don't wanna help u wrongly haha @Mertsj probs knows :) good luck!!! :D
 one year ago

MertsjBest ResponseYou've already chosen the best response.2
\[y=2x^2+6x+4\] \[y=2(x^2+3x+______ )+4\]
 one year ago

MertsjBest ResponseYou've already chosen the best response.2
Now complete the square by adding (3/2)^2 inside the parentheses: \[y=2(x^2+3x+(\frac{3}{2})^2)+4\frac{9}{2}\]
 one year ago

MertsjBest ResponseYou've already chosen the best response.2
Now factor: \[y=2(x+\frac{3}{2})^2\frac{1}{2}\]
 one year ago

MertsjBest ResponseYou've already chosen the best response.2
I want to show you something: \[x^2+6x+9=(x+3)^2\]
 one year ago

that1chickBest ResponseYou've already chosen the best response.0
I don't get what you did with: (3/2^2)+4−92
 one year ago

MertsjBest ResponseYou've already chosen the best response.2
Notice the relationship between the coefficient of x and the constant term in a trinomial square.
 one year ago

MertsjBest ResponseYou've already chosen the best response.2
If you take 1/2 the coefficient and square it, you get the constant term.
 one year ago

MertsjBest ResponseYou've already chosen the best response.2
So I took 1/2 of 3 and got 3/2. Then I squared it and added it to the x^2 + 3x to get a trinomial square.
 one year ago

MertsjBest ResponseYou've already chosen the best response.2
Now the (3/2)^2 was inside a parenthesis which has a 2 in front of it so I was really adding 2 times (3/2)^2 which is 2 times 9/4 which is 9/2. So since I could not change the equation, I then had to subtract 9/2.
 one year ago

that1chickBest ResponseYou've already chosen the best response.0
Okay, yes! I get what you did (: thank you! what were you trying to show me with those other two equations?
 one year ago

MertsjBest ResponseYou've already chosen the best response.2
The relationship between the coefficient of x and the constant term.
 one year ago

that1chickBest ResponseYou've already chosen the best response.0
oh, that half of the coefficient of x to the second power = the constant. okay, cool
 one year ago

that1chickBest ResponseYou've already chosen the best response.0
Thank you for helping me (:
 one year ago
See more questions >>>
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.