International Brotherhood of Electrical Workers Exam IBEW Quiz
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ALGEBRA & FUNCTIONS
Question 1
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For tool design, determine the roots of
x
2
−
4
x
−
21
x^2-4x-21
x
2
−
4
x
−
21
by factoring.
A
(
x
−
7
)
(
x
+
3
)
(x-7)(x+3)
(
x
−
7
)
(
x
+
3
)
B
(
x
+
7
)
(
x
−
3
)
(x+7)(x-3)
(
x
+
7
)
(
x
−
3
)
C
(
x
−
1
)
(
x
+
21
)
(x-1)(x+21)
(
x
−
1
)
(
x
+
21
)
D
(
x
−
3
)
(
x
−
7
)
(x-3)(x-7)
(
x
−
3
)
(
x
−
7
)
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