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Mathematics
Problem
One of the zeros of the quadratic polynomial
x
2
+
(
k
−
3
)
x
+
2
k
x^2 + (k-3)x + 2k
x
2
+
(
k
−
3
)
x
+
2
k
is
−
1
-1
−
1
. Which of the following gives the correct value of
k
k
k
and the factorised form of the polynomial? a)
k
=
2
,
(
x
−
1
)
(
x
−
4
)
k=2,\;(x-1)(x-4)
k
=
2
,
(
x
−
1
)
(
x
−
4
)
b)
k
=
−
4
,
(
x
+
1
)
(
x
−
8
)
k=-4,\;(x+1)(x-8)
k
=
−
4
,
(
x
+
1
)
(
x
−
8
)
c)
k
=
4
,
(
x
−
1
)
(
x
−
8
)
k=4,\;(x-1)(x-8)
k
=
4
,
(
x
−
1
)
(
x
−
8
)
d)
k
=
−
2
,
(
x
+
1
)
(
x
−
4
)
k=-2,\;(x+1)(x-4)
k
=
−
2
,
(
x
+
1
)
(
x
−
4
)
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