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kenneyfamily
Group Title
4x  y = 1
x + 2y = 7
how could i solve this using an inverse matrix?
 one year ago
 one year ago
kenneyfamily Group Title
4x  y = 1 x + 2y = 7 how could i solve this using an inverse matrix?
 one year ago
 one year ago

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tkhunny Group TitleBest ResponseYou've already chosen the best response.0
1) Use the coefficients to form a 2x2 matrix. 2) Augment this matric by I2 3) Perform row operations to find the inverse of the original matrix. Are we ringing bells?
 one year ago

kenneyfamily Group TitleBest ResponseYou've already chosen the best response.0
would you write the matrix as 4 1 1 2
 one year ago

tkhunny Group TitleBest ResponseYou've already chosen the best response.0
That is part #1. Very good. Next...
 one year ago

kenneyfamily Group TitleBest ResponseYou've already chosen the best response.0
what do you mean by augment it by I2?
 one year ago

tkhunny Group TitleBest ResponseYou've already chosen the best response.0
\[\left[\begin{matrix}4 & 1 & 1 & 0\\ 1 & 2 & 0 & 1\end{matrix}\right]\]
 one year ago

kenneyfamily Group TitleBest ResponseYou've already chosen the best response.0
why did you do that? sorry i'm confused
 one year ago

tkhunny Group TitleBest ResponseYou've already chosen the best response.0
Well, this is one very useful way to find an Inverse Matrix. You've never seen it, before?
 one year ago

kenneyfamily Group TitleBest ResponseYou've already chosen the best response.0
I may have but I forgot how to do it
 one year ago

tkhunny Group TitleBest ResponseYou've already chosen the best response.0
How about "Elementary Row Operations"? Any of those floating around in your bag of tricks?
 one year ago

kenneyfamily Group TitleBest ResponseYou've already chosen the best response.0
I wish I could say yes but no. I'm retaking a precalc course because i failed it the first time
 one year ago

tkhunny Group TitleBest ResponseYou've already chosen the best response.0
Well, you're going to have to get a few things up to speed. Finding an inverse matrix is an important skill. You'll have to start somewhere. Try this: http://www.youtube.com/watch?v=RsTdy2r9DHk
 one year ago

kenneyfamily Group TitleBest ResponseYou've already chosen the best response.0
ok thanks!!
 one year ago
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