9. Tutorial--Calculating the Determinant: Example 7. In this example a is
positive and b and c are negative, discriminant is positive. Point out to
students that in this configuration the discriminant can only be positive.
10. Tutorial--Calculating the Determinant: Example 8. In this example a and
b are positive and c is negative, discriminant is positive. Point out to
students that in this configuration the discriminant can only be positive.
11. Tutorial--Calculating the Determinant: Example 9. In this example c is
positive and b and a are negative, discriminant is positive. . Point out
to students that in this configuration the discriminant can only be
positive.
12. Tutorial--Calculating the Determinant: Example 10. In this example c and
b are positive and a is negative, discriminant is positive. Point out to
students that in this configuration the discriminant can only be positive.