SAT Math Practice Question #39413 - SATify | SATify

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SAT Math Practice Question #39413 - SATify | SATify

#39413

equations

quadratic equations

medium

75 sec

Calculator OK

For which of the following values of $k$ does the equation $x^{2} + k x + 9 = 0$ have exactly one real solution?

A.

$3$

B.

$6$

C.

$9$

D.

$18$