Chapter 1 Quadratic Equations In One Unknown Worksheet With Answers Page 11
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341
Quadratic Equations in One Unknown
− 11x − 242 = 0
2
3.
x
Solve the following quadratic equations using
the quadratic formula. (Leave your answers
Solution
in surd form.) (5 – 7)
+ 9x + 2 = 0
2
5.
5x
− −
±
−
−
−
2
(
11
)
(
11
)
4
(1)
(
242
)
x =
Solution
2 1
( )
±
11
1089
=
− ±
−
2
9
9
4 5 2
( )( )
2
x =
2 5
( )
±
11
33
=
2
− ±
9
41
=
=
−
22
or
11
10
− x − 40 = 0
− 4x − 1 = 0
2
2
4.
6.
6x
13x
Solution
Solution
− −
±
−
2
−
−
(
4
)
(
4
)
4 13
( )( )
1
x =
− −
±
−
2
−
−
( )
1
( )
1
4 6
( )(
40
)
x =
2 13
( )
2 6
( )
±
4
68
=
±
1
961
=
26
12
±
4
2 17
±
=
1
31
=
26
12
±
2
17
=
8
5
=
−
or
13
3
2
11
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