Find the sum of the roots of the equation 2x2 + 3x – 9 = 0
-
A.
-18 -
B.
-6 -
C.
(-frac{9}{2}) -
D.
(-frac{3}{2})
Correct Answer: Option D
Explanation
The general quadratic equation
x2 – (sum of roots) x + (product of root) = 0
Comparing with the given equation
2x2 +3x2 – 9 = 0; (x^2 + frac{3}{2}x – frac{9}{2} = 0\
Sum hspace{1mm} of hspace{1mm}roots = -frac{3}{2})