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Q.

Let a,b and c be real numbers such that 4a+2b+c = 0 and ab > 0. Then the equation ax2+bx+c = 0 has

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a

exactly one root

b

none of these

c

complex roots

d

real roots

answer is C.

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Detailed Solution

Sum of coefficients =θ⇒x=1 is a root. 
product of roots =c(a−b)a(b−c)

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