Complex Numbers Practice

√-4

• -2

• -2i

• 2

• 2i

• A
• B
• C
• D

Simplify -4√-63

• 3i√7
• -12i√7
• -12√7
• 36√7

Find the solutions to the equation:

2x² +23 = 5

• $x=3i$

• $x=\pm3i$

• $x=3$

• $x=\pm3$

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Find the conjugate of:

5 + 7i

• 5 − 7i

• -5 − 7i

• 5i - 7

• 5i + 7

Tags

CCSS.HSN.CN.A.3

What is the correct conjugate of this complex number?

• 10 - 2i

• -10 - 2i

• -10 + 2i

• 10 + 2i

Tags

CCSS.HSN.CN.A.3

Find the value of x and y that makes the equation true: $3x-5i=6-\left(10y\right)i$  

•  $x=2,\ y\ =\frac{1}{2}$  

•  $x=-2,\ y=2$  

•  $x=2,\ y=2$  

•  $x=-2,\ y=\frac{1}{2}$  

Tags

CCSS.HSN.CN.A.1

i⁶⁶

• 1
• i
• -1
• -i

Tags

CCSS.HSN.CN.A.2

Simplify:
(3 + 2i) + (4i + 6)

• 9 + 6i
• 7i + 8
• 9 + 6i²
• 9 - 6i

Tags

CCSS.HSN.CN.A.2

Simplify:
(4 + 7i) - (3 + 2i)

• 1 + 5i
• 7 + 9i
• 1 + 9i
• -1 + 5i

Tags

CCSS.HSN.CN.A.2