What is the conjugate of the complex zero 2 - 3i?

Understanding Quadratic Functions with Complex Zeros

Interactive Video
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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
2 - 3i
2 + 3i
-2 + 3i
-2 - 3i
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If a quadratic function has zeros r1 and r2, what is the general form of the function?
f(x) = a(x + r1)(x + r2)
f(x) = a(x - r1)(x - r2)
f(x) = a(x + r1)(x - r2)
f(x) = a(x - r1)(x + r2)
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to the graph of a quadratic function with complex zeros?
It intersects the x-axis at two points.
It forms a straight line.
It does not intersect the x-axis.
It intersects the x-axis at one point.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the result of multiplying (x - (2 - 3i))(x - (2 + 3i))?
x^2 + 4x + 13
x^2 - 4x - 13
x^2 + 4x - 13
x^2 - 4x + 13
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the value of i^2 in complex numbers?
1
-1
0
i
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the sum of the products 2x + 3i and -3i x 2?
0
6i
-6i
12i
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the simplified form of the expression 4 - 9i^2?
4 + 9
-4 - 9
4 - 9
-4 + 9
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