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Multiple choice

Find the sum of the roots of the equation $\sqrt{5}y^2- 4\sqrt{5}y- 10 = 0$

  1. $\frac{\sqrt{5}}{2}$
  2. 4

  3. $\frac{4}{5}$
  4. $\frac{3}{10}$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

For a quadratic equation ax^2 + bx + c = 0, the sum of the roots is -b/a. Here a = sqrt(5), b = -4*sqrt(5). Sum = -(-4*sqrt(5)) / sqrt(5) = 4.

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