1. **State the problem:** Solve the equation $x - 3 - 3x(x - 3) = 0$ for $x$.
2. **Rewrite the equation:** The equation is $x - 3 - 3x(x - 3) = 0$.
3. **Expand the product:** Use distributive property to expand $-3x(x - 3)$:
$$-3x(x - 3) = -3x^2 + 9x$$
4. **Substitute back:** The equation becomes:
$$x - 3 - 3x^2 + 9x = 0$$
5. **Combine like terms:** Combine $x$ and $9x$:
$$-3x^2 + 10x - 3 = 0$$
6. **Rewrite in standard quadratic form:**
$$-3x^2 + 10x - 3 = 0$$
7. **Multiply both sides by $-1$ to simplify:**
$$3x^2 - 10x + 3 = 0$$
8. **Use quadratic formula:** For $ax^2 + bx + c = 0$, solutions are
$$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$$
Here, $a=3$, $b=-10$, $c=3$.
9. **Calculate discriminant:**
$$\Delta = b^2 - 4ac = (-10)^2 - 4 \times 3 \times 3 = 100 - 36 = 64$$
10. **Calculate roots:**
$$x = \frac{-(-10) \pm \sqrt{64}}{2 \times 3} = \frac{10 \pm 8}{6}$$
11. **Find each root:**
- For $+$ sign:
$$x = \frac{10 + 8}{6} = \frac{18}{6} = 3$$
- For $-$ sign:
$$x = \frac{10 - 8}{6} = \frac{2}{6} = \frac{1}{3}$$
12. **Final answer:** The solutions are
$$x = 3 \quad \text{or} \quad x = \frac{1}{3}$$
Quadratic Equation 3D4447
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