1. **State the problem:**
We need to solve the system of inequalities:
$$x^2 + y - 8 \geq 0$$
$$y + 5x - 2 \geq 0$$
2. **Rewrite each inequality to isolate $y$:**
- For the quadratic inequality:
$$x^2 + y - 8 \geq 0 \implies y \geq 8 - x^2$$
- For the linear inequality:
$$y + 5x - 2 \geq 0 \implies y \geq 2 - 5x$$
3. **Interpretation:**
The solution set consists of all points $(x,y)$ where $y$ is greater than or equal to both $8 - x^2$ and $2 - 5x$ simultaneously.
4. **Find the intersection points of the boundary curves:**
Set the right sides equal to find where the two curves meet:
$$8 - x^2 = 2 - 5x$$
Rearranged:
$$-x^2 + 5x + 6 = 0$$
Multiply both sides by $-1$:
$$x^2 - 5x - 6 = 0$$
5. **Solve the quadratic equation:**
Using the quadratic formula:
$$x = \frac{5 \pm \sqrt{(-5)^2 - 4 \cdot 1 \cdot (-6)}}{2 \cdot 1} = \frac{5 \pm \sqrt{25 + 24}}{2} = \frac{5 \pm \sqrt{49}}{2}$$
So,
$$x = \frac{5 + 7}{2} = 6$$
or
$$x = \frac{5 - 7}{2} = -1$$
6. **Find corresponding $y$ values:**
For $x=6$:
$$y = 8 - 6^2 = 8 - 36 = -28$$
For $x=-1$:
$$y = 8 - (-1)^2 = 8 - 1 = 7$$
7. **Solution region:**
The solution is the set of points where:
$$y \geq 8 - x^2$$
and
$$y \geq 2 - 5x$$
which is the region above both curves.
**Final answer:**
$$\boxed{\{(x,y) \mid y \geq 8 - x^2 \text{ and } y \geq 2 - 5x\}}$$
Solve Inequalities Acf580
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