4A Algebra 2 Review

Simplify: 
(7 + 2i)(9 - 6i)

• 75-24i
• 63 - 24i  - 12i²
• 51 - 24i
• 58 + 60i

What does i² = ?

• -1
• √-1
• 1
• -√1

Multiply
(3i)(-2+4i)

• -6+12i
• -12-6i
• -2+7i
• 12+6i

Multiply: 
(4 – 3i)(7 + 2i)

• A.  22 - 13i
• B.  28 - 19i
• C.  34 - 13i
• D.  -34 - 29i

How do you write a complex number?

• a-bi

• a+bi

• ai+b

• ai-b

Simplify:  (4+2i)/(3-i)

• 1-i
• 1+i
• 10+10i
• 1+10i

What letter represents an imaginary number?

• a

• i

• j

• x

(-3-i)(6-i)

• -21-7i
• -19-3i
• -15-5i
• -17-9i

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

• 74
• 75
• 74-1

A complex number can be expressed as a + bi. What does a represent?

• the real part of the complex number

• the imaginary part of the complex number

• depends on the sign of the number

• the square root of the complex number