Digital SAT Math Practice Question #2268
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Desmos Hack: Type the expression into Desmos directly to locate vertices, roots, and intersections effortlessly.
A perfect square $(x + p)^2 = x^2 + 2px + p^2$. Here $p^2 = 36 \implies p = \pm 6$. Then $k = 2p = \pm 12$. Since $k < 0$, $k = -12$....
Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...
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