Math 2 Unit 5: Solving Quadratic and other EquationsQuiz 2A: Quadratic Formula and Discriminant
5.
Find the discriminant, then check the type and number of solutions.
SHOW ALL WORK AND BOX IN YOUR FINAL ANSWERS!
1.-x² – 6x – 9=0
2. 2x² = 10x +5
3.-10n²-n-9=0
4.-7n² + 16n = 8n
Simplify each of the following.
-14 ± √-28
2
Solve each equation using the quadratic formula.
7. x² + 4x-6=0
Discriminant
Name:
6.
Date:
Two
One
Rational Rational
Roots
Root
6± √9+72
3
Period:
Two
Two
Irrational Imaginary
Roots
Roots
8.-2x²-x-3=0E
28
9. -6x² + 7x = -3
Solve each equation by completing the square.
11. (x – 5)² +6=−10
12. x² + 4x-9=0
10. 8x² – 6x + 3 = 5x²
13. x² – 8x = 5
14. x² + 2x + 10 = -17
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