If there are two unique solutions to the equation $x^2 + bx + 9 = 0,$ which of the following could not be a value of

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Gmat_mission: Legendary Member; Posts: 1622; Joined: Thu Mar 01, 2018 7:22 amFollowed by: 2 members

by Gmat_mission » Thu Jul 22, 2021 10:53 am

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If there are two unique solutions to the equation $x^2 + bx + 9 = 0,$ which of the following could not be a value of $b?$

A. -10
B. -6.5
C. -6
D. 6.5
E. 10

Answer: C

Source: Veritas Prep

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Source: Beat The GMAT — Problem Solving | Thu Jul 22, 2021 10:53 am

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