The root of a quadratic equation in x, are -m and 2n. Find the equation
-
A.
(x^2 + x(m – 2n)-2mn=0) -
B.
(x^2 – x(m – 2n)-2mn=0) -
C.
(x^2 – x(m – 2n)+2mn=0) -
D.
(x^2 + x(m – 2n)+2mn=0)
Correct Answer: Option B
Explanation
x = -m (implies) x + m = 0;
x = 2n (implies) x – 2n = 0.
(implies (x + m)(x – 2n) = 0)
(x^2 + mx – 2nx – 2mn = 0)
(x^2 + x(m – 2n) – 2mn = 0)