Precalculus 2014
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PAGE: 393 | SET: Exercises | PROBLEM: 27 |
Please look in your text book for this problem Statement

The system of equations are
Write the equations into matrix form .
Where is coefficient matrix,
is variable matrix and
is constant matrix.
Definition of inverse matrix :
If is an
then
, where
.
Let , then
.
, then
has an inverse.
Cofactor of is
Cofactor of
.
Find .
.
The inverse of the is
Multiply by
to solve the system.
is
.
,
and
.

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