Square Root Functions — Unit test Answers
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1
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Solve for in the equation .
A
x = 3 plus-or-minus StartRoot 23 EndRoot
B
x = 3 plus-or-minus StartRoot 51 EndRoot
C
x = 3 plus-or-minus StartRoot 41 EndRoot
D
x = 3 plus-or-minus StartRoot 5 EndRoot
2
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What is the sum of 12 – 5i and –3 + 4i?
A
–16 + 63iB
9 – iC
9 – 9iD
15 – 9i4
What are the values of x in the equation x2 – 6x + 9 = 25?
A
x = –2 or x = 8B
x = –1 or x = –11C
x = 1 or x = 11D
x = 2 or x = –85
Which point shows the location of 5 – 2i on the complex plane below?
A
point AB
point BC
point CD
point D6
Which pair of complex numbers has a real-number product?
A
(1 + 3i)(6i)B
(1 + 3i)(2 – 3i)C
(1 + 3i)(1 – 3i)D
(1 + 3i)(3i)7
For what values of m does the graph of y = mx2 – 5x – 2 have no x-intercepts?
A
m greater-than negative StartFraction 25 Over 8 EndFraction
B
m less-than negative StartFraction 25 Over 8 EndFraction
C
m less-than StartFraction 25 Over 8 EndFraction
D
m greater-than StartFraction 25 Over 8 EndFraction
8
What is the value of i 97 – i?
A
–iB
0C
–2iD
i Superscript 96
9
If the discriminant of a quadratic equation is 4, which statement describes the roots?
A
There are two complex roots.B
There are two real roots.C
There is one real root.D
There is one complex root.12
Which equation is an example of the commutative property of multiplication?
A
(4 + 2i) = (2i + 4)B
(4 + 2i)(3 – 5i) = (3 – 5i)(4 + 2i)C
(4 + 2i)(3 – 5i) = (4 + 2i)(3 – 5i)(1)D
(4 + 2i) = (4 + 2i + 0)15
Solve for in the equation .
A
x = negative 11 plus-or-minus StartFraction 25 Over 2 EndFraction
B
x = negative eleven-halves plus-or-minus StartFraction 25 Over 2 EndFraction
C
x = negative 11 plus-or-minus StartFraction 5 StartRoot 5 EndRoot Over 2 EndFraction
D
x = negative eleven-halves plus-or-minus StartFraction 5 StartRoot 5 EndRoot Over 2 EndFraction
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