Precalculus 2014
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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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