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irakobra [83]
3 years ago
5

Select the correct answer.

Mathematics
1 answer:
Sophie [7]3 years ago
8 0

Answer:

D)  x² -x - 10  =0

Step-by-step explanation:

Given that

             \frac{2}{3x-6} - \frac{1}{3x+6} = \frac{1}{3}

L.C.M

         \frac{2(3x+6)-(3x-6)}{(3x+6)(3x-6)} = \frac{1}{3}

        \frac{(6x+12-3x+6)}{(3x+6)(3x-6)} = \frac{1}{3}

          \frac{(3x+18)}{((3x)^{2} )-(6)^{2} } = \frac{1}{3}

    ⇒ 3(3x+18) = 9 x^{2} - 36

   ⇒ 9 x + 54 = 9 x² - 36

  ⇒ 9 x² - 36 - 9x - 54 =0

⇒ 9 x²  - 9x - 90 =0

⇒ 9(x² -x - 10 ) =0

⇒ x² -x - 10  =0

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