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AriM
Group Title
Using the quadratic function, provide the x intercepts of x^2+4x21
Can someone just tell me what the quadratic function is..?
 one year ago
 one year ago
AriM Group Title
Using the quadratic function, provide the x intercepts of x^2+4x21 Can someone just tell me what the quadratic function is..?
 one year ago
 one year ago

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myininaya Group TitleBest ResponseYou've already chosen the best response.1
The quadratic function you have is x^2+4x21 The graph will be a parabola
 one year ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
To find the xintercepts, set your quadratic expression(function) equal to 0. Then solve for x.
 one year ago

AriM Group TitleBest ResponseYou've already chosen the best response.0
hmm thats what i did @myininaya and i got x = 7 and 3 but the teacher wrote 2 and use quadratic function..
 one year ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
What is 2 suppose to be ? Your xintercepts are correct for this quadratic function.
 one year ago

AriM Group TitleBest ResponseYou've already chosen the best response.0
Oh im just saying he took off 2 points and wrote use quadratic function.
 one year ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
Does he mean formula?
 one year ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
The quadratic formula is \[x=\frac{b \pm \sqrt{b^24ac}}{2a} \]
 one year ago

AriM Group TitleBest ResponseYou've already chosen the best response.0
hmm ill try it.
 one year ago

AriM Group TitleBest ResponseYou've already chosen the best response.0
Thanks for your help
 one year ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
Np. Good luck.
 one year ago

AriM Group TitleBest ResponseYou've already chosen the best response.0
oh if you do the quadratic function you get 3 and 7. Can you check that for me? @myininaya
 one year ago

AriM Group TitleBest ResponseYou've already chosen the best response.0
actually, never mind. I see his point but you could have just done (x+7) (x3) and gotten the intercepts that way.
 one year ago

AriM Group TitleBest ResponseYou've already chosen the best response.0
do you write it as (3,0) and (7,0) though?
 one year ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
Yep You could have factored or used the quadratic formula.
 one year ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
It is more proper to say the xintercepts are (3,0) and (7,0) I would say it is informal to say they are 3 and 7
 one year ago

AriM Group TitleBest ResponseYou've already chosen the best response.0
Yea, i understand.
 one year ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
Coolness.
 one year ago
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