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· quad-3
Quadratics & Vieta · Discriminant
AMC 10 style
●●●○○ 5/10
~3 min
⏱ 0:00
For what positive value of
k
k
k
does
x
2
+
k
x
+
9
=
0
x^2 + kx + 9 = 0
x
2
+
k
x
+
9
=
0
have exactly one solution?
discriminant
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