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Program: QUAD
QUAD
- Solves equations of the form
- Finds rational, irrational, and imaginary solutions
- Can be used to factor quadratic polynomials.
Useful for:
- SAT
- ACT
- Algebra 1
- Algebra 2
- Geometry
- Precalculus
- Calculus
- College Algebra
Example 2
Q: Solve the equation:
Solution:
First rewrite the equation in the form
Run QUAD. How?
Enter the coefficients
for A, B, and C:
The program reports:
Interpretation:
x = -1 + 1.73i or
x = -1 - 1.73i
The third number listed is NOT a solution. It is the discriminant. Notice it says 'D=' for this number, not 'X='. You may want to know the discriminant if you are using the quadratic formula to solve this equation by hand. In this problem, the discriminant is -12. Because it is negative, you know you will have two imaginary solutions (not real).
See Example 1
