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Express 2/(x+5) - 5/(3x-4) as a single fraction to its lowest form

Mathematics

ScanSolve AI Answer

Answer

x−33(x+5)(3x−4)\frac{x-33}{(x+5)(3x-4)}

Step-by-step solution

6 steps
  1. Find a common denominator for the two fractions.

    The denominators are (x+5)(x+5) and (3x−4)(3x-4). The least common denominator (LCD) is the product of these two denominators: (x+5)(3x−4)(x+5)(3x-4).

  2. Rewrite each fraction with the common denominator.

    For the first fraction, multiply the numerator and denominator by (3x−4)(3x-4):

    2x+5=2(3x−4)(x+5)(3x−4)\frac{2}{x+5} = \frac{2(3x-4)}{(x+5)(3x-4)}

    For the second fraction, multiply the numerator and denominator by (x+5)(x+5):

    53x−4=5(x+5)(x+5)(3x−4)\frac{5}{3x-4} = \frac{5(x+5)}{(x+5)(3x-4)}
  3. Subtract the rewritten fractions.

    2(3x−4)(x+5)(3x−4)−5(x+5)(x+5)(3x−4)=2(3x−4)−5(x+5)(x+5)(3x−4)\frac{2(3x-4)}{(x+5)(3x-4)} - \frac{5(x+5)}{(x+5)(3x-4)} = \frac{2(3x-4) - 5(x+5)}{(x+5)(3x-4)}
  4. Expand the terms in the numerator.

    2(3x−4)=6x−82(3x-4) = 6x - 8 5(x+5)=5x+255(x+5) = 5x + 25

    Substitute these back into the numerator:

    (6x−8)−(5x+25)(6x - 8) - (5x + 25)
  5. Simplify the numerator by distributing the negative sign and combining like terms.

    6x−8−5x−256x - 8 - 5x - 25

    Combine the xx terms: 6x−5x=x6x - 5x = x
    Combine the constant terms: −8−25=−33-8 - 25 = -33
    The simplified numerator is x−33x - 33.

  6. Write the expression as a single fraction in its lowest form.

    The numerator is x−33x-33 and the denominator is (x+5)(3x−4)(x+5)(3x-4). There are no common factors between the numerator and the denominator, so the fraction is in its lowest form.

    x−33(x+5)(3x−4)\frac{x-33}{(x+5)(3x-4)}
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