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91Ó°ÊÓ

Add or subtract as indicated. $$\frac{x}{x^{2}-2 x-24}-\frac{x}{x^{2}-7 x+6}$$

Short Answer

Expert verified
The simplified form of the expression is \(-5x/(x-6)(x+4)(x-1)\)

Step by step solution

01

Factor the Denominators

Split the quadratic expressions of each factor into two binomial expressions: \(x^{2}-2x-24=(x-6)(x+4)\) and \(x^{2}-7x+6=(x-6)(x-1)\). So, we rewrite the expression as \[\frac{x}{(x-6)(x+4)}-\frac{x}{(x-6)(x-1)}\].
02

Find the Least Common Denominator

As \(x-6\) is already a common factor, hence the least common denominator (LCD) for the two fractions will be \((x-6)(x+4)(x-1)\).
03

Rewrite the Fractions with the LCD

We rewrite the fractions using the LCD. The first fraction lacks the \((x-1)\) term, and the second fraction lacks the \((x+4)\) term in the denominator. So \[\frac{x}{(x-6)(x+4)}-\frac{x}{(x-6)(x-1)} = \frac{x(x-1)}{(x-6)(x+4)(x-1)}- \frac{x(x+4)}{(x-6)(x+4)(x-1)}\].
04

Subtract the Fractions

Now subtract the fractions: \[\frac{x(x-1)}{(x-6)(x+4)(x-1)}- \frac{x(x+4)}{(x-6)(x+4)(x-1)} = \frac{x^2 - x - x^2 - 4x}{(x-6)(x+4)(x-1)}\] Simplify to get: \(-5x/(x-6)(x+4)(x-1)\)

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