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Question 0107a
Equations and Inequalities
2007 Paper 1 Question 1 Variant
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−
2
x
2
+
18
x
+
68
x
2
−
4
x
−
21
+
3
=
x
2
+
6
x
+
5
x
2
−
4
x
−
21
.
\frac{ - 2 x^2 + 18 x + 68 }{ x^2 - 4 x - 21 } + 3=\frac{ x^2 + 6 x + 5 }{ x^2 - 4 x - 21 }.
x
2
−
4
x
−
21
−
2
x
2
+
18
x
+
68
+
3
=
x
2
−
4
x
−
21
x
2
+
6
x
+
5
.
Hence, without using a calculator, solve the inequality
−
2
x
2
+
18
x
+
68
x
2
−
4
x
−
21
<
−
3
\frac{ - 2 x^2 + 18 x + 68 }{ x^2 - 4 x - 21 } < -3
x
2
−
4
x
−
21
−
2
x
2
+
18
x
+
68
<
−
3
[5]
Answer
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