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What are the solutions to the equation [tex]\frac{w}{2w-3}=\frac{4}{w}[/tex]?

A. [tex]w=-6[/tex] and [tex]w=-2[/tex]
B. [tex]w=0[/tex], [tex]w=2[/tex], and [tex]w=6[/tex]
C. [tex]w=0[/tex] and [tex]w=\frac{3}{2}[/tex]
D. [tex]w=2[/tex] and [tex]w=6[/tex]


Sagot :

Let's solve the equation [tex]\(\frac{w}{2w-3} = \frac{4}{w}\)[/tex] step-by-step.

1. Start with the given equation:
[tex]\[ \frac{w}{2w - 3} = \frac{4}{w} \][/tex]

2. Cross-multiply to eliminate the fractions:
[tex]\[ w \cdot w = 4 \cdot (2w - 3) \][/tex]
Simplifying, we have:
[tex]\[ w^2 = 8w - 12 \][/tex]

3. Rearrange the equation to bring all terms to one side:
[tex]\[ w^2 - 8w + 12 = 0 \][/tex]

4. Solve the quadratic equation using the quadratic formula where [tex]\(a = 1\)[/tex], [tex]\(b = -8\)[/tex], and [tex]\(c = 12\)[/tex]:
[tex]\[ w = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \][/tex]
Plugging in the values:
[tex]\[ w = \frac{8 \pm \sqrt{(-8)^2 - 4 \cdot 1 \cdot 12}}{2 \cdot 1} \][/tex]
Simplify inside the square root:
[tex]\[ w = \frac{8 \pm \sqrt{64 - 48}}{2} \][/tex]
[tex]\[ w = \frac{8 \pm \sqrt{16}}{2} \][/tex]
[tex]\[ w = \frac{8 \pm 4}{2} \][/tex]

5. Determine the two solutions:
[tex]\[ w = \frac{8 + 4}{2} = \frac{12}{2} = 6 \][/tex]
[tex]\[ w = \frac{8 - 4}{2} = \frac{4}{2} = 2 \][/tex]

So the solutions to the equation [tex]\(\frac{w}{2w-3} = \frac{4}{w}\)[/tex] are [tex]\(w = 2\)[/tex] and [tex]\(w = 6\)[/tex].

Therefore, the correct answer is:
[tex]\[ w = 2 \; \text{and} \; w = 6 \][/tex]