Unit1 - Q3

What does i² =  ?

• 1
• -1
• √-1
• √1

Calculate:
i + 6i

• 6i²
• 7i
• 5i
• 7i²

Add/Subtract using the proper rules:
(7 + 2i) - (-12 - 4i)

• -5 - 2i
• 19 - 2i
• -5 + 6i
• 19 + 6i

Calculate: 
(1 − 2i) + (-4 + 2i)

• -3
• -3 − 4i
• 5 − 4i
• 5

Calculate: 
-12i + 7i

• 19i
• -19i
• 5i
• -5i

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

What letter usually represent imaginary number?

• a
• i
• j
• x

Like terms have ________.

• only the same variable

• the same power but different variables

• the same variable but different powers

• the same variable at the same power