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Mathematics
Problem
For which value(s) of
k
k
k
does the quadratic equation
2
x
2
+
k
x
+
8
=
0
2x^2+kx+8=0
2
x
2
+
k
x
+
8
=
0
have equal real roots? a)
8
8
8
only b)
±
4
2
\pm 4\sqrt{2}
±
4
2
c)
8
or
−
8
8 \text{ or } -8
8
or
−
8
d)
±
4
\pm 4
±
4
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