1. **State the problem:** Solve the system of inequalities:
$$ (x + 3)(2 - x) \leq 0 $$
and
$$ \frac{x - a}{2x} > 0 $$
2. **Solve the first inequality:**
$$ (x + 3)(2 - x) \leq 0 $$
- The product of two factors is less than or equal to zero, meaning the product is non-positive.
- This happens when one factor is positive and the other is negative, or when the product is zero.
3. **Find critical points:**
Set each factor to zero:
$$ x + 3 = 0 \Rightarrow x = -3 $$
$$ 2 - x = 0 \Rightarrow x = 2 $$
4. **Test intervals determined by critical points:**
Intervals: $(-\infty, -3)$, $[-3, 2]$, $(2, \infty)$
- For $x < -3$, say $x = -4$:
$$ (x + 3)(2 - x) = (-4 + 3)(2 - (-4)) = (-1)(6) = -6 < 0 $$
- For $-3 < x < 2$, say $x = 0$:
$$ (0 + 3)(2 - 0) = 3 \times 2 = 6 > 0 $$
- For $x > 2$, say $x = 3$:
$$ (3 + 3)(2 - 3) = 6 \times (-1) = -6 < 0 $$
5. **Include points where product is zero:**
At $x = -3$ or $x = 2$, product is zero, so included.
6. **Solution for first inequality:**
$$ (-\infty, -3] \cup [2, \infty) $$
7. **Solve the second inequality:**
$$ \frac{x - a}{2x} > 0 $$
- A fraction is positive if numerator and denominator have the same sign.
8. **Analyze numerator and denominator signs:**
- Numerator: $x - a$
- Denominator: $2x$
9. **Case 1: Both numerator and denominator positive:**
$$ x - a > 0 \Rightarrow x > a $$
$$ 2x > 0 \Rightarrow x > 0 $$
Combined: $x > \max(a, 0)$
10. **Case 2: Both numerator and denominator negative:**
$$ x - a < 0 \Rightarrow x < a $$
$$ 2x < 0 \Rightarrow x < 0 $$
Combined: $x < \min(a, 0)$
11. **Solution for second inequality:**
$$ (-\infty, \min(a, 0)) \cup (\max(a, 0), \infty) $$
12. **Combine solutions of both inequalities:**
We want $x$ values satisfying both:
$$ (-\infty, -3] \cup [2, \infty) $$
and
$$ (-\infty, \min(a, 0)) \cup (\max(a, 0), \infty) $$
13. **Intersection:**
- Intersection of $(-\infty, -3]$ and $(-\infty, \min(a, 0))$ is $(-\infty, \min(-3, a, 0)]$
- Intersection of $[2, \infty)$ and $(\max(a, 0), \infty)$ is $[\max(2, a, 0), \infty)$
14. **Final solution:**
$$ (-\infty, \min(-3, a, 0)] \cup [\max(2, a, 0), \infty) $$
This depends on the value of $a$.
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**Summary:**
- First inequality solution: $(-\infty, -3] \cup [2, \infty)$
- Second inequality solution: $(-\infty, \min(a, 0)) \cup (\max(a, 0), \infty)$
- Combined solution: $$ (-\infty, \min(-3, a, 0)] \cup [\max(2, a, 0), \infty) $$
Inequality System 73Ac59
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