1. Let's consider the problem: Solve the quadratic equation $$x^2 - 5x + 6 = 0$$ on your own.
2. The formula to solve quadratic equations is the quadratic formula:
$$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$$
where $a$, $b$, and $c$ are coefficients from the quadratic equation $ax^2 + bx + c = 0$.
3. Important rules:
- Calculate the discriminant $\Delta = b^2 - 4ac$.
- If $\Delta > 0$, there are two real and distinct solutions.
- If $\Delta = 0$, there is one real solution.
- If $\Delta < 0$, there are no real solutions (complex solutions).
4. For the equation $x^2 - 5x + 6 = 0$, identify $a=1$, $b=-5$, and $c=6$.
5. Calculate the discriminant:
$$\Delta = (-5)^2 - 4 \times 1 \times 6 = 25 - 24 = 1$$
6. Since $\Delta = 1 > 0$, there are two real solutions.
7. Apply the quadratic formula:
$$x = \frac{-(-5) \pm \sqrt{1}}{2 \times 1} = \frac{5 \pm 1}{2}$$
8. Calculate the two solutions:
$$x_1 = \frac{5 + 1}{2} = 3$$
$$x_2 = \frac{5 - 1}{2} = 2$$
9. Final answer: The solutions to the equation are $x=3$ and $x=2$.
Try solving this on your own to practice!
Quadratic Example
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