The root of a quadratic equation in x, are -m and 2n. Fin...
The root of a quadratic equation in x, are -m and 2n. Find the equation
x2+x(m−2n)−2mn=0
x2−x(m−2n)−2mn=0
x2−x(m−2n)+2mn=0
x2+x(m−2n)+2mn=0
Correct answer is A
x = -m ⟹ x + m = 0;
x = 2n ⟹ x - 2n = 0.
⟹(x+m)(x−2n)=0
x2+mx−2nx−2mn=0
x2+x(m−2n)−2mn=0
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