Answer:
-5 < x < -4
General Formulas and Concepts:
Algebra I
- Equality Properties
- Standard Form: ax² + bx + c = 0
- Factoring
- Find roots
Step-by-step explanation:
Step 1: Define
x² + 9x < -20
Step 2: Solve for x
- Rewrite [SF]: x² + 9x + 20 < 0
- Factor: (x + 5)(x + 4) < 0
- Find roots: x < -5 and x < -4
- Rewrite: -5 < x < -4
This tells us that the value of x must be between -5 and -4 in order to render the inequality true.
