Complex Numbers and Conjugates

Simplify the following expression:

-3(7-4i)

• -21+12i

• -10+12i

• -21+4i

• 21-12i

Tags

CCSS.HSN.CN.A.2

Simplify the following expression:

-4i(9+7i)

• 28-36i

• -36i-28i²

• -36i-28

• -13i+28i

Tags

CCSS.HSN.CN.A.2

Simplify the following expression:

-12i(-2-4i)

• 24i-48

• -48-24i

• 24-48i

• -48+24i

Tags

CCSS.HSN.CN.A.2

Simplify the following expression:

(5-5i)(-2+3i)

• 25

• 10-15i

• 5+25i

• -10-15i

Tags

CCSS.HSN.CN.C.8

Simplify the following expression:

(-2+6i)(2-6i)

• 32+24i

• -32+24i

• -32+24i

• 40

Tags

CCSS.HSN.CN.C.8

Simplify the following expression:

(5+6i)(5-6i)

• 11

• 61

• -11

• 22

Tags

CCSS.HSN.CN.C.8

When Multiplying Conjugates, you can skip the "O" and the "I" parts of the FOIL Method.

• True

• False

• Mostly True

• Kinda true

Simplify the following expression

• 
• 
• 
• 

Tags

CCSS.HSN.CN.A.3

Find the conjugate of the complex number 7 - 5i.

• 7 + 5i

• -7 + 5i

• -7 - 5i

• 5i - 7

Tags

CCSS.HSN.CN.A.3

Find the conjugate of the complex number -3 + (4/5)i.

• -3 - (4/5)i

• 3 - (4/5)i

• 3 + (4/5)i

• -3 + (4/5)i

Tags

CCSS.HSN.CN.A.3