 Imaginary Numbers
2 years ago
laurenehrlich
Save
Edit
Host a game
Live GameLive
Homework
Solo Practice
Practice 17 QuestionsShow answers
• Question 1
120 seconds
Q. Simplify √-4
2i
-2i
2
4i
• Question 2
120 seconds
Q. Simplify -√-8
-i√8
-2i√2
2i√2
-8i
• Question 3
60 seconds
Q. Calculate:
i + 6i
6i2
7i
5i
7i2
• Question 4
120 seconds
Q. Calculate:
(4 − 7i) − (-3 + 6i)
7 − 13i
7 − i
1 − 13i
1 − i
• Question 5
120 seconds
Q. Calculate:
(1 − 2i) + (-4 + 2i)
-3
-3 − 4i
5 − 4i
5
• Question 6
60 seconds
Q. What does i=  ?
1
-1
√-1
√1
• Question 7
120 seconds
Q. Calculate:
-4 (13 + 5i)
-52 − 20i
9 + i
17 − 20i
-52 + 20i
• Question 8
120 seconds
Q. 6i (-5 + 10i)
-30i + 60i2
30i − 16i2
11i + 60i2
-11i2+ 16i
• Question 9
300 seconds
Q. Calculate (multiply):
(4 + 3i)(4 − 3i)
16 − 9i2
25
7
8 − 6i
• Question 10
300 seconds
Q. Calculate (multiply):
(1 − 2i)(6 + 5i)
16 − 7i
-16 + 7i
-16 − 7i
16 + 7i
• Question 11
60 seconds
Q. Find the conjugate of:
5 + 7i
5 − 7i
-5 − 7i
-5 + 7i
• Question 12
60 seconds
Q. Find the conjugate of:
-4 − 8i
-4 + 8i
4 − 8i
4 + 8i
• Question 13
300 seconds Q. Calculate(Divide, multiply by conjugate):
12/5 − 4/5i
-8/10i − 4/5
-4/5 + 12/5i
12/5 + 4/5i
• Question 14
300 seconds Q. Calculate(Divide, multiply by conjugate):
-3/4 − 1/4i
3/4 + 1/4i
-3/4 + 1/4i
3/4 − 1/4i
• Question 15
180 seconds
Q. Simplify:
(10+ 15i)-(48 - 30i)
58 - 45i
58 - 15i
-38 - 15i
-38 + 45i
• Question 16
120 seconds
Q. i7
i
-i
1
-1
• Question 17
30 seconds
Q. i13