What is a complex number?
T8.2 Complex Numbers, Matrices, Vectors (QZ)

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•
Mathematics
•
9th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is the imaginary unit, defined as i = √(-1).
2.
FLASHCARD QUESTION
Front
What is the product of (4-5i)(4+5i)?
Back
41
3.
FLASHCARD QUESTION
Front
What is a matrix?
Back
A matrix is a rectangular array of numbers, symbols, or expressions, arranged in rows and columns, used to represent data or solve systems of equations.
4.
FLASHCARD QUESTION
Front
What is the sum of (5-2i) + (-7+8i)?
Back
-2+6i
5.
FLASHCARD QUESTION
Front
What does the term 'vector' refer to in mathematics?
Back
A vector is a quantity that has both magnitude and direction, often represented as an ordered pair (x, y) in a two-dimensional space.
6.
FLASHCARD QUESTION
Front
What is the vertical component of the vector <3,4>?
Back
4
7.
FLASHCARD QUESTION
Front
What is the horizontal component of the vector <3,4>?
Back
3
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