Find the roots of the equation 10x2 – 13x – 3 = 0
-
A.
x = (frac{3}{5}) or -(frac{1}{2}) -
B.
x = (frac{3}{10}) or -1 -
C.
x = (frac{3}{10}) or 1 -
D.
x = (frac{1}{5}) or (frac{-3}{2}) -
E.
x = -(frac{1}{5}) or (frac{3}{2})
Correct Answer: Option E
Explanation
10x2 – 13x – 3 = 0 = 10x2 – 15x + 2x – 3 = 0
5x(2x – 3) + 2x – 3 = 0
= (5x + 1)(2x – 3) = 0
5x + 1 = 0 or 2x – 3 = 0
x = -(frac{1}{5}) or (frac{3}{2})