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Algebra and functions
Paper 1 · Algebra and functions
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The equation
x
2
+
(
k
−
2
)
x
+
k
+
1
=
0
x^2 + (k - 2)x + k + 1 = 0
x
2
+
(
k
−
2
)
x
+
k
+
1
=
0
, where
k
k
k
is a real constant, has two distinct real roots. Which of the following describes all possible values of
k
k
k
?
A
k
<
0
k < 0
k
<
0
or
k
>
8
k > 8
k
>
8
B
0
<
k
<
8
0 < k < 8
0
<
k
<
8
C
k
>
8
k > 8
k
>
8
D
k
≤
0
k \le 0
k
≤
0
or
k
≥
8
k \ge 8
k
≥
8
E
0
≤
k
≤
8
0 \le k \le 8
0
≤
k
≤
8
F
k
<
0
k < 0
k
<
0
Hint
Check
Press A–F to choose, Enter to check.