Introduction to Complex Numbers

Quiz
•
Mathematics
•
11th Grade
•
Hard
Standards-aligned
Anthony Clark
FREE Resource
19 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is (3 - 5i) + (-4 + 7i)?
-1+2i
1+2i
7-12i
-2+3i
Tags
CCSS.HSN.CN.A.2
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is (-5 + 3i) - (4 + 7i)?
-1- 4i
-1+4i
-9-4i
-9+4i
Tags
CCSS.HSN.CN.A.2
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If z1 = 2 + 5i and z2 = 3 - 2i, what is z1 × z2 as a single complex number?
-4+11i
16-19i
6-10i
16+11i
Tags
CCSS.HSN.CN.A.2
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is (4 - 5i)(-2 + 7i)?
27+18i
-43+18i
-43+38i
27+38i
Tags
CCSS.HSN.CN.A.2
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is a complex number?
A number that can be expressed in the form a + bi, where a and b are real numbers, and i is the imaginary unit.
A number that can only be expressed in the form a - bi
A number that has no real part
A number that can only be expressed in the form a + bi
Answer explanation
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. This choice correctly defines a complex number.
Tags
CCSS.HSN.CN.A.1
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
An imaginary number is also part of which of the following set of numbers?
Real
Whole
Irrational
Complex
Rational
Tags
CCSS.HSN.CN.A.1
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A complex number can be expressed as a + bi. What does a represent?
the real part of the complex number
the imaginary part of the complex number
depends on the sign of the number
the square root of the complex number
Tags
CCSS.HSN.CN.A.1
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