Subjects algebra

Quadratic Inequalities 12Fac3

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Question: 1. y > x^2 - x - 6 2. y \leq x^2 + 7x + 10 Graph the quadratic inequality and shade the region that contains the solution (the graph need to be a picture)
1. **State the problem:** We need to graph the system of quadratic inequalities: $$y > x^2 - x - 6$$ and $$y \leq x^2 + 7x + 10$$ 2. **Understand the inequalities:** - The first inequality is strict ($>$), so the boundary curve $y = x^2 - x - 6$ is not included. - The second inequality is inclusive ($\leq$), so the boundary curve $y = x^2 + 7x + 10$ is included. 3. **Graph the boundary curves:** - For $y = x^2 - x - 6$, this is a parabola opening upwards. - For $y = x^2 + 7x + 10$, this is also a parabola opening upwards. 4. **Find the intersection points of the two parabolas:** Set $$x^2 - x - 6 = x^2 + 7x + 10$$ Simplify: $$-x - 6 = 7x + 10$$ $$-x - 7x = 10 + 6$$ $$-8x = 16$$ $$x = \frac{16}{-8} = -2$$ Find $y$ at $x = -2$: $$y = (-2)^2 - (-2) - 6 = 4 + 2 - 6 = 0$$ So the parabolas intersect at $(-2, 0)$. 5. **Determine the solution region:** - For $y > x^2 - x - 6$, shade above the parabola $y = x^2 - x - 6$. - For $y \leq x^2 + 7x + 10$, shade below or on the parabola $y = x^2 + 7x + 10$. The solution region is where these shaded areas overlap. 6. **Summary:** The solution is the region above the parabola $y = x^2 - x - 6$ and at or below the parabola $y = x^2 + 7x + 10$. **Final answer:** The graph shows two parabolas intersecting at $(-2,0)$ with the solution region shaded between them, above the first parabola and below the second.