Adding & Subtracting Complex Numbers
Authored by Tracy Cornelius
Mathematics
11th Grade
CCSS covered
Used 18+ times
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15 questions
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1.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Select all that are true.
√ -1 is an imaginary number
There are no real numbers that satisfy the equation x=√-1.
Because √-1 is imaginary, we cannot do math with it.
The equation x2=-1 has real solutions.
√-1 = -1 because -1⋅-1 = -1
Tags
CCSS.HSN.CN.A.1
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain why (x+5)2 = -10 has no real solutions.
x2 can never equal a negative number because a number times itself will always be postive.
x2 cant be negative
the is not a nice, whole number.
There is not a number +5 that equals -10.
Tags
CCSS.HSA-REI.B.4B
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Find all solutions to each equation, real or imaginary.
x2=4
2, -2
2
-2
2i, -2i
Tags
CCSS.8.EE.A.2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Find all solutions to each equation, real or imaginary.
x2=-36
6,-6
6
-6
6i, -6i
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Write the expression in the form of a+bi, where a and b are real numbers.
3 ⋅ √-25
15
-15
15i
-15i
Tags
CCSS.HSN.CN.A.1
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Write the expression in the form of a+bi, where a and b are real numbers.
-3i ⋅ 2i
-6
6
-6i
6i
Tags
CCSS.HSN.CN.A.2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Simplify.
(-6 - 4i) + (1 + 4i) = _______
-5+i
-7-8i
5
Tags
CCSS.HSN.CN.A.2
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