SAT Math Practice Question #38274 - SATify | SATify

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SAT Math Practice Question #38274 - SATify | SATify

#38274

simplification

roots

factoring

equations

quadratic equations

algebra

hard

75 sec

Calculator OK

For what positive value of $k$ does the equation $x^{2} + k x + 9 = 0$ have exactly one real solution?

A.

3

B.

6

C.

9

D.

18