What is the form of complex conjugates?

Understanding Quadratic Functions with Complex Zeros

Interactive Video
•
Mathematics
•
9th - 12th Grade
•
Hard

Lucas Foster
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
a + bi and a - bi
a + b and a - b
a - b
a + b
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If 2i is a zero of a quadratic function, what must be another zero?
-2
2i
-2i
2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What do the zeros of a quadratic function tell us about the function?
The domain of the function
The y-intercepts
The factors of the function
The slope of the function
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens graphically if the zeros of a quadratic function are not real?
The graph will intersect the x-axis
The graph will be a straight line
The graph will not intersect the x-axis
The graph will have a vertex at the origin
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the factor form of a quadratic function with zeros 2i and -2i?
(x - 2)(x + 2)
(x - 2i)(x + 2i)
(x + 2i)(x + 2i)
(x - 2i)(x - 2i)
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the result of multiplying (x - 2i) and (x + 2i)?
x^2 + 4
x^2 - 4
x^2 + 2
x^2 - 2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the value of i squared?
-1
i
1
0
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