Solving Quadratic Equations: Quadratic Formula — Test Answers
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What is the absolute value of the complex number ?
A
StartRoot 14 EndRoot
B
3 StartRoot 2 EndRoot
C
14D
183
A function g(x) has x-intercepts at (, 0) and (6, 0). Which could be g(x)?
A
g(x) = 2(x + 1)(x + 6)B
g(x) = (x – 6)(2x – 1)C
g(x) = 2(x – 2)(x – 6)D
g(x) = (x + 6)(x + 2)4
Rounded to the nearest hundredth, what is the positive solution to the quadratic equation 0=2x2+3x-8?Quadratic formula: x =
A
1.39B
2.00C
2.89D
3.506
What is the distance from the origin to point P graphed on the complex plane below?
A
StartRoot 7 EndRoot
B
StartRoot 29 EndRoot
C
7D
297
Zacharias is using the quadratic formula to solve the equation 0 = –2x2 + 5x – 3. He begins by substituting as shown.Quadratic formula: x = Substitution:
A
The –5 should be 5.B
The 52 should be –52.C
The 2 in the numerator should be –2.D
The 2 in the denominator should be –2.10
Which of the following is an example of a complex number that is not in the set of real numbers?
A
-7B
2 + StartRoot 3 EndRoot
C
4 + 9iD
Pi
11
If , what is the value of i 3?
A
–1B
iC
1D
–i12
What are the solution(s) to the quadratic equation 9x2 = 4?
A
x = and x =
B
x = and x =
C
x = and x =
D
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