Algebra help vol safe a hb breathren

November 19, 2013 @ 03:21:10 AM
Post: 1028
Join Date: Apr 2012
Location: 916
Ok so I have to find a quadratic function in standard form for a set of points

Here they are
[-1,2],[0,1],[1,-4]

I plug them into the formula

-2=a[1]^2+b[1]+c
a+b+c

1=a[0]^2+b[0]+c
c=1

-4=a[1]^2+b[1]+c= a+b+c

-2=a+b+1 because c=1
-4=a+b+1

subtract 1
-3=a+b
-5=a+b

Now if I were to make either -3 or -5 positive it would also make the and b negative and it would cross out both the a and b. I can only get rid of one.
November 19, 2013 @ 03:29:13 AM
Post: 724
Join Date: Aug 2012
The first equation is 2 = a - b + c not -2 = a + b + c

The same equations can't have different answers if a and b are constants which is why you're running into trouble at the end.
November 19, 2013 @ 03:30:04 AM
Post: 5018
Join Date: Feb 2009
I think you need some help on English as well.
November 19, 2013 @ 03:34:52 AM
Post: 2453
Join Date: Jul 2012
Location: USA
if u in highschool 
and have an algebra textbook u can find most of the answers on a website called slader it has em page by pag

taste the glamour

November 19, 2013 @ 03:36:25 AM
Post: 1028
Join Date: Apr 2012
Location: 916
The first equation is 2 = a - b + c not -2 = a + b + c

The same equations can't have different answers if a and b are constants which is why you're running into trouble at the end.


I took your tips and I got

1=a+b
-4=a+b

Lets say [-1]1=a+b 
-1=-a-b
-4=a+b

Would this mean this equation is unsolvable because the and b would both cross out?
November 19, 2013 @ 03:36:47 AM
Post: 2731
Join Date: Jan 2013
Location: Earth
if u in highschool 
and have an algebra textbook u can find most of the answers on a website called slader it has em page by pag
Thanks man I'm using this!! 

Zooey Deschanel is waifu

November 19, 2013 @ 03:39:55 AM
Post: 1028
Join Date: Apr 2012
Location: 916
if u in highschool 
and have an algebra textbook u can find most of the answers on a website called slader it has em page by pag
its a given assignment, not in the book 
November 19, 2013 @ 03:44:05 AM
Post: 724
Join Date: Aug 2012
The first equation is 2 = a - b + c not -2 = a + b + c

The same equations can't have different answers if a and b are constants which is why you're running into trouble at the end.


I took your tips and I got

1=a+b
-4=a+b

Lets say [-1]1=a+b 
-1=-a-b
-4=a+b

Would this mean this equation is unsolvable because the and b would both cross out?
Naw you made another small mistake



that should be right
November 19, 2013 @ 04:01:25 AM
Post: 926
Join Date: Nov 2010
Location: Hawai'i
this should just be the official help with math thread
November 19, 2013 @ 04:09:24 AM
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