1. **Stating the problem:** Find the area of the region bounded by the curve $y = x^2 - 3x$ and the line $y = 3 - x$.
2. **Find the points of intersection:** Set the two equations equal to find $x$ values where they intersect:
$$x^2 - 3x = 3 - x$$
Rearrange:
$$x^2 - 3x + x - 3 = 0$$
$$x^2 - 2x - 3 = 0$$
3. **Solve the quadratic equation:**
$$x^2 - 2x - 3 = 0$$
Use the quadratic formula $x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$ with $a=1$, $b=-2$, $c=-3$:
$$x = \frac{2 \pm \sqrt{(-2)^2 - 4(1)(-3)}}{2} = \frac{2 \pm \sqrt{4 + 12}}{2} = \frac{2 \pm \sqrt{16}}{2}$$
$$x = \frac{2 \pm 4}{2}$$
So,
$$x = 3 \quad \text{or} \quad x = -1$$
4. **Determine which function is on top between $x=-1$ and $x=3$:**
Test at $x=0$:
$$y_{curve} = 0^2 - 3(0) = 0$$
$$y_{line} = 3 - 0 = 3$$
Since $3 > 0$, the line is above the curve in this interval.
5. **Set up the integral for the area:**
$$\text{Area} = \int_{-1}^{3} \left[(3 - x) - (x^2 - 3x)\right] dx = \int_{-1}^{3} (3 - x - x^2 + 3x) dx = \int_{-1}^{3} (3 + 2x - x^2) dx$$
6. **Integrate:**
$$\int (3 + 2x - x^2) dx = 3x + x^2 - \frac{x^3}{3} + C$$
7. **Evaluate definite integral:**
$$\left[3x + x^2 - \frac{x^3}{3}\right]_{-1}^{3} = \left(3(3) + 3^2 - \frac{3^3}{3}\right) - \left(3(-1) + (-1)^2 - \frac{(-1)^3}{3}\right)$$
Calculate each part:
$$= (9 + 9 - 9) - (-3 + 1 + \frac{1}{3}) = 9 - (-1.666\ldots) = 9 + 1.666\ldots = 10.666\ldots$$
8. **Final answer:**
$$\text{Area} = \frac{32}{3}$$
This is the area of the region bounded by the curve and the line.
Bounded Area D19Aba
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