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The quadratic equation whose roots are A...

The quadratic equation whose roots are A.M and H . M between the roots of the equation a `x^(2)+b x+c=0` is

A

1: `a b x^(2)+(b^(2)+4 a c) x+b c=0`

B

2: `2 a b x^(2)+(b^(2)+4 a c) x+2 b c=0`

C

3: `2 a b x^(2)+(b^(2)+4 a c) x+b c=0`

D

4: `a b x^(2)+2(b^(2)+4 a c) x+b c=0`

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The correct Answer is:
B
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