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Let z(1) and z(2) be two roots of the eq...

Let `z_(1)` and `z_(2)` be two roots of the equation `z^(2)+az+b=0`, `z` being complex number, assume that the origin `z_(1)` and `z_(2)` form an equilateral triangle , then

A

(a)`abs(a) le 1`

B

(b)`abs(a) le 2`

C

(c)`arg(a)=arg(b^(2))`

D

(d)`arg(a^(2))=arg(b)`

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The correct Answer is:
B, D
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