Homework Help: Math Linear Algebra

Posted by Allan on Wednesday, October 5, 2011 at 12:14pm.

Find the inverses of the matrices.

Let A = 1 2
5 12

b1 = -1
3

b2 = 1
-5

b3 = 2
6

b4 = 3
5

Find A^-1, and use it to solve the four equations.

Ax = b1, Ax = b2, Ax = b3, Ax = b4

Math Linear Algebra - Steve, Wednesday, October 5, 2011 at 2:24pm
Only A has an inverse. Only square matrices have inverses. A^-1 =

6 -1
-5/2 1/2

Now just plug it in

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