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Unit 2, Pretest on Polynomials and Rational Functions with Answers
Blackline Masters, Advanced Math-PreCalculus
Page 43
Louisiana Comprehensive Curriculum, Revised 2008
1. Factor to find the roots in each of the problems below.
a.
x
2
– 5
x
– 14 = 0
Factors
_(x – 7)(x + 2)_
Roots
__7 and -2
_____
b. 2
x
2
– 13
x
+ 6 = 0
Factors
_(2x – 1)(x – 6)
R
o
o
t
s
_
_
1/2 and 6
_____
2. Use the quadratic formula to solve 2
x
2
-3
x
– 4 = 0
x
=
+
34
1
44
or
3- 41
3. Find the discriminant and use it to describe the nature of the roots in each of the
following equations.
a. 2
x

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