Concepts in complex numbers

 $z\ ,\ z_{1_{ }\ }and\ z_2\$  are complex number , then  $\overline{z_1+z_2}\ =\ \overline{z_1}\ +\ \overline{z_2}$  

• True

• False

Tags

CCSS.HSN.CN.A.3

What is the complex conjugate of   $4-3i$  ?

•   $-4i-3$  

•   $-4-3i$  

•  $-4+3i$  

•  $4+3i$  

Tags

CCSS.HSN.CN.A.3

What is the conjugate of 2 - 7i ?

• 7 + 2i

• 2 + 7i

• -2 - 7i

• -2 + 7i

Tags

CCSS.HSN.CN.A.3

Pick the conjugates.

• (4-i)(-4+i)

• (4-2)(2+4)

• (4-i)(4+i)

• x²+x

Tags

CCSS.HSN.CN.A.3

The complex conjugate can be found by...

• Changing the sign of both a and b

• Changing the sign of a

• Changing the sign of b

• Switching the a and b values

Tags

CCSS.HSN.CN.A.3

Find the conjugate of the complex number 2 - 3i.

• 2 + 3i

• -2 + 3i

• -2 - 3i

• 3i - 2

Tags

CCSS.HSN.CN.A.3

What is the conjugate of -2+5i?

• -5+2i
• -2-5i
• 2+5i
• 5-2i

Tags

CCSS.HSN.CN.A.3

Given one complex zero use the conjugate root theorem to find another.  Zero is: -12-8i

• 12+8i
• -12+8i
• 12-8i
• -12-8i

Tags

CCSS.HSN.CN.A.3

Find the conjugate of
 ( -5 + 7i)

• (5 - 7i)
• (-5 - 7i)
• (-5 + 7i)
• (5 + 7i)

Tags

CCSS.HSN.CN.A.3

What is the complex conjugate of  4-3i? Its complex conjugate is ______

Tags

CCSS.HSN.CN.A.3