1. The problem is to solve the quadratic equation $x^2 - 3x - 10 = 0$.
2. The general form of a quadratic equation is $ax^2 + bx + c = 0$.
3. We use the quadratic formula to find the roots:
$$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$$
where $a=1$, $b=-3$, and $c=-10$.
4. Calculate the discriminant:
$$\Delta = b^2 - 4ac = (-3)^2 - 4 \times 1 \times (-10) = 9 + 40 = 49$$
5. Since $\Delta > 0$, there are two distinct real roots.
6. Substitute values into the quadratic formula:
$$x = \frac{-(-3) \pm \sqrt{49}}{2 \times 1} = \frac{3 \pm 7}{2}$$
7. Calculate each root:
- For the plus sign:
$$x = \frac{3 + 7}{2} = \frac{10}{2} = 5$$
- For the minus sign:
$$x = \frac{3 - 7}{2} = \frac{\cancel{3} - 7}{\cancel{2}} = \frac{-4}{2} = -2$$
8. Therefore, the solutions to the equation $x^2 - 3x - 10 = 0$ are:
$$x = 5 \quad \text{or} \quad x = -2$$
Quadratic Equation D1D4C4
Step-by-step solutions with LaTeX - clean, fast, and student-friendly.