1. **State the problem:** Solve the equation $$(3x - 1)^2 - (5x - 3)^2 = (4x - 2)^2$$ for $x$.
2. **Recall the formula:** This is a difference of squares on the left side: $$a^2 - b^2 = (a - b)(a + b)$$ where $$a = 3x - 1$$ and $$b = 5x - 3$$.
3. **Apply the difference of squares:**
$$
(3x - 1)^2 - (5x - 3)^2 = ((3x - 1) - (5x - 3))((3x - 1) + (5x - 3))
$$
Simplify each factor:
$$
(3x - 1) - (5x - 3) = 3x - 1 - 5x + 3 = -2x + 2
$$
$$
(3x - 1) + (5x - 3) = 3x - 1 + 5x - 3 = 8x - 4
$$
So the left side becomes:
$$
(-2x + 2)(8x - 4)
$$
4. **Rewrite the equation:**
$$
(-2x + 2)(8x - 4) = (4x - 2)^2
$$
5. **Expand the left side:**
$$
(-2x + 2)(8x - 4) = -2x \cdot 8x + (-2x)(-4) + 2 \cdot 8x + 2 \cdot (-4) = -16x^2 + 8x + 16x - 8 = -16x^2 + 24x - 8
$$
6. **Expand the right side:**
$$
(4x - 2)^2 = (4x)^2 - 2 \cdot 4x \cdot 2 + 2^2 = 16x^2 - 16x + 4
$$
7. **Set the equation:**
$$
-16x^2 + 24x - 8 = 16x^2 - 16x + 4
$$
8. **Bring all terms to one side:**
$$
-16x^2 + 24x - 8 - 16x^2 + 16x - 4 = 0
$$
Simplify:
$$
-32x^2 + 40x - 12 = 0
$$
9. **Divide entire equation by -4 to simplify:**
$$
\cancel{-4} \times (8x^2 - 10x + 3) = 0 \Rightarrow 8x^2 - 10x + 3 = 0
$$
10. **Solve quadratic equation:**
Use quadratic formula:
$$
x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$$
where $$a=8$$, $$b=-10$$, $$c=3$$.
Calculate discriminant:
$$\Delta = (-10)^2 - 4 \times 8 \times 3 = 100 - 96 = 4$$
Calculate roots:
$$
x = \frac{10 \pm \sqrt{4}}{16} = \frac{10 \pm 2}{16}$$
So,
$$
x_1 = \frac{10 + 2}{16} = \frac{12}{16} = \frac{3}{4}$$
$$
x_2 = \frac{10 - 2}{16} = \frac{8}{16} = \frac{1}{2}$$
**Final answer:**
$$x = \frac{3}{4} \text{ or } x = \frac{1}{2}$$
Solve Quadratic A27601
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