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The condition for one root of x^3+ax...

The condition for one root of `x^3+ax^2+bx+c=0` is sum of the other two roots , is

A

a^3=4(ab-c)

B

a^3=4(ab-2c)

C

a^3=ab-c

D

a^3=ab-2c

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The correct Answer is:
A
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AAKASH SERIES-THEORY OF EQUATIONS-EXERCISE-III
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