WHAT IS WRONG, if anything, with each statement in Problems 1–4? Explain your reasoning.
1. If x(x + 8) < 0, then x < 0 and x + 8 < 0.
2. If x(x + 2) ≥ 0, then x + 2 ≥ 0 (divide both sides by x).
3. If ax2 + bx + c < 0, then the critical values are
4. Solve 3x2 < 8−10x
Solve each inequality in Problems 5–24. State the solution using interval notation. You can solve these problems algebraically or geometrically. If you use a calculator for a graphical solution, show a sketch of the graph on your paper.
LEVEL 2
Solve each inequality in Problems ...
Get Precalculus: A Functional Approach to Graphing and Problem Solving, 6th Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
