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Multiple choice

Roots of quadratic equation $\displaystyle\,2x\,-\,\frac{10}{x}\,=\,1$ are

  1. $\displaystyle\,2,\,\frac{5}{2}$
  2. $\displaystyle\,-2,\,\frac{-5}{2}$
  3. $\displaystyle\,-2,\,\frac{5}{2}$
  4. None of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

2x - 10/x = 1. Multiply by x: 2x^2 - x - 10 = 0. (2x - 5)(x + 2) = 0. Roots are x = 5/2 and x = -2.

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