GarettNguyen545 GarettNguyen545
  • 26-02-2019
  • Mathematics
contestada

find the least common denominator of 5x / x^2 -7x -30 and 8 / x^2 -5x -24

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MsRay
MsRay MsRay
  • 26-02-2019

Answer:

(x - 10)(x - 8)(x + 3) = x³ - 15x² + 34x + 240

Step-by-step explanation:

To find the common denominator of the two fractions, you need to first factor the polynomials:

x² - 7x - 30 = (x - 10)(x + 3)

x² - 5x - 24 = (x - 8)(x + 3)

Since the common binomial is (x + 3), both denominators would need to also include (x - 10) and (x - 8).  So, the full common denominator is:

(x + 3)(x - 10)(x - 8)

When you multiply these polynomials out using distribution and FOIL:

x³ - 15x² + 34x + 240

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