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Solve for [tex]\(x\)[/tex].

[tex]\[ \frac{1}{x-2}+\frac{6x}{x^2-4}=\frac{3}{x+2} \][/tex]

A. [tex]\(x=\frac{1}{3}\)[/tex]

B. no solution

C. [tex]\(x=-1\)[/tex]

D. [tex]\(x=-2\)[/tex]


Sagot :

To solve the equation:

[tex]\[ \frac{1}{x-2} + \frac{6x}{x^2-4} = \frac{3}{x+2}, \][/tex]

we'll break it down step-by-step.

First, note that [tex]\(x^2 - 4\)[/tex] can be factored:

[tex]\[ x^2 - 4 = (x-2)(x+2). \][/tex]

This allows us to rewrite the equation as:

[tex]\[ \frac{1}{x-2} + \frac{6x}{(x-2)(x+2)} = \frac{3}{x+2}. \][/tex]

To solve this equation, we need to find a common denominator for the fractions. The common denominator is [tex]\((x-2)(x+2)\)[/tex]. Rewrite each term with this common denominator:

[tex]\[ \frac{(x+2)}{(x-2)(x+2)} + \frac{6x}{(x-2)(x+2)} = \frac{3(x-2)}{(x-2)(x+2)}. \][/tex]

Combine all the terms over the common denominator:

[tex]\[ \frac{x+2 + 6x}{(x-2)(x+2)} = \frac{3(x-2)}{(x-2)(x+2)}. \][/tex]

Simplify the numerators:

[tex]\[ \frac{7x+2}{(x-2)(x+2)} = \frac{3x-6}{(x-2)(x+2)}. \][/tex]

Since the denominators are now the same, we can equate the numerators:

[tex]\[ 7x + 2 = 3x - 6. \][/tex]

Solve for [tex]\(x\)[/tex]:

[tex]\[ 7x + 2 = 3x - 6, \][/tex]
[tex]\[ 7x - 3x = -6 - 2, \][/tex]
[tex]\[ 4x = -8, \][/tex]
[tex]\[ x = -2. \][/tex]

However, if we look closer, [tex]\(x = -2\)[/tex] makes the original denominators zero (the terms [tex]\(\frac{1}{x-2}\)[/tex] and [tex]\(\frac{3}{x+2}\)[/tex] both become undefined). Thus, [tex]\(x = -2\)[/tex] is not a valid solution. We must consider potential solutions:

Reviewing the relationship, it is evident that there is no value of [tex]\(x\)[/tex] that would satisfy this equation without causing a division by zero or conflicting terms, i.e., [tex]\(x - 2\)[/tex] or [tex]\(x + 2\)[/tex] cannot be zero simultaneously while satisfying the equation's equality.

Thus, ultimately, the equation has:

[tex]\[ \text{No solution.} \][/tex]

The only scenario we encounter makes the equation undefined, resulting in no solution.