7. Systems of Equations & Matrices
Determinants and Cramer's Rule
7. Systems of Equations & Matrices
Determinants and Cramer's Rule: Study with Video Lessons, Practice Problems & Examples
Back to all problems
43PRACTICE PROBLEM
For the following matrix, evaluate the cofactors of each element in the second row.
![{"mathml":"<math style=\"font-family:stix;font-size:16px;\" xmlns=\"http://www.w3.org/1998/Math/MathML\"><mstyle mathsize=\"16px\"><mfenced open=\"[\" close=\"]\"><mtable><mtr><mtd><mo>-</mo><mn>7</mn></mtd><mtd><mn>0</mn></mtd><mtd><mn>5</mn></mtd></mtr><mtr><mtd><mn>3</mn></mtd><mtd><mn>7</mn></mtd><mtd><mn>0</mn></mtd></mtr><mtr><mtd><mn>8</mn></mtd><mtd><mn>7</mn></mtd><mtd><mn>3</mn></mtd></mtr></mtable></mfenced></mstyle></math>","truncated":false}](https://lightcat-files.s3.amazonaws.com/problem_images/bfd1a0e64c9af42e-1682090435587.jpg "open square brackets table row cell negative 7 end cell 0 5 row 3 7 0 row 8 7 3 end table close square brackets")
For the following matrix, evaluate the cofactors of each element in the second row.