Additional Mathematics Module 3 - Quadratic Equations Worksheets With Answer Key Page 32
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32
33ANSWERS
Exercises 1
5
2
2
2
a. -3, -28, x
+ 3x – 28 = 0
b.
,
, , 3x
-5x – 2 = 0
3
3
5
1
7
2
2
2
c.
,
, 6x
- 5x + 1 = 0
d.
,
, 15x
+ 7x – 2 = 0
6
6
15
15
2
21k
18
k
2
2
e.
,
, 5x
- 21kx – 18 k
= 0
5
5
Exercises 2
a.
-73 , - 61
b. 2, - 5
7
1
c.
-1,
,
d.
, 1
2
8
k
k
1
e.
,
4
4
Exercises 3
1.
Two different roots
2. Two different roots
3.
No real roots
4. Two equal roots
Exercises 4
1.
m = 4
2. m = 9
3.
m = 3 and -1
4. m = - 3 and -1
3
1
5.
m = 3 and 6
6. m =
and
2
2
Exercises 5
4
1. h > - 9
2.
h >
3
3. h < 6
4.
h < 2
9
7
5. h <
6.
h >
8
4
31
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