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Mathematics
Problem
The quadratic polynomial
2
x
2
+
k
x
+
8
2x^2 + kx + 8
2
x
2
+
k
x
+
8
has equal zeros. If
k
k
k
is positive, which of the following is the correct pair of
k
k
k
and the factorised form of the polynomial? a)
k
=
8
,
2
(
x
−
2
)
2
k = 8,\;2(x-2)^2
k
=
8
,
2
(
x
−
2
)
2
b)
k
=
16
,
2
(
x
+
4
)
2
k = 16,\;2(x+4)^2
k
=
16
,
2
(
x
+
4
)
2
c)
k
=
8
,
2
(
x
+
2
)
2
k = 8,\;2(x+2)^2
k
=
8
,
2
(
x
+
2
)
2
d)
k
=
4
,
2
(
x
+
2
)
2
k = 4,\;2(x+2)^2
k
=
4
,
2
(
x
+
2
)
2
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