Multiple choice Find the sum of the roots of the equation $\sqrt{5}y^2- 4\sqrt{5}y- 10 = 0$ $\frac{\sqrt{5}}{2}$ 4 $\frac{4}{5}$ $\frac{3}{10}$ 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.