Algebra 3 Solving Quadratic Equations Worksheet - Brunel University Page 9
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13Exercises
Solve the following quadratic equations.
2
x
9x + 20 = 0
1.
2
x
+ 6x + 8 = 0
2.
2
x
+ x
12 = 0
3.
2
x
+ 8x + 16 = 0
4.
2
x
+ 4x
10 = 0
5.
2
x
+ 7x
21 = 0
6.
2
3x
+ 5x
11 = 0
7.
2
13x
4x + 7 = 0
8.
2
13x
4x
7 = 0
9.
Solutions to Exercises
x
= 5, x
= 4
1.
1
2
x
=
2, x
=
4
2.
1
2
x
= 3, x
=
4
3.
1
2
x
= x
= 4
4.
,
1
2
√
√
x
=
2
14, x
=
2 +
14
5.
1
2
√
√
1
1
x
=
( 7
133), x
=
( 7 +
133)
6.
1
2
2
2
√
√
1
1
x
=
( 5
157), x
=
( 5 +
157)
7.
1
2
6
6
8. No real solutions.
√
√
1
1
x
=
(2
95), x
=
(2 +
95)
9.
1
2
13
13
9
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