a.
To write: The given system of equations in the matrix form.
Given:
Calculation:
The given system of equations can be written in the matrix form as
Hence the matrix form is
b.
To find: The determinant of the matrix
Given:
Calculation:
By expanding along the first row, it follows that
c.
To solve: The given system of equations.
Given:
Calculation:
Let the given equations be,
Adding equations (1) and (2), it follows that
Adding equations (2) and (3) by multiplying 2 to equation (3). That is,
Now,
Now put
Now put
Hence, the solution is
Chapter 14 Solutions
High School Math 2015 Common Core Algebra 2 Student Edition Grades 10/11
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