CHAPTER 3.1

What is the value of i²?

• 1

• -1

• √-1

• 0

Which of the following is correct for i?

• i = -1

• i = √-1

• i = 1

• i = √1

If i² = -1, then i⁴ equals:

• 1

• -1

• i

• -i

Identify the real part of the complex number:

z = 6 - 4i​ ​ ​

Write the standard form of the complex number that has:

Real part = -2.5, Imaginary part = 3

√-4

• -2

• -2i

• 2

• 2i

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Simplify.

• -5i
• 5
• 5i
• -5

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

If z₁ = 4 + 5i and z₂ = -2 + 3i, then z₁ + z₂ =

• 2+8i

• 6+2i

• 2+2i

• -2+8i

If z₁ = 6 - 2i and z₂ = 1 - 4i, then z₁ - z₂ =

• 5 + 2i

• 7 + 2i

• 5 - 6i

• 7 - 6i

When adding two complex numbers, you should:

• Add the real parts and multiply the imaginary parts

• Add both the real and imaginary parts separately

• Multiply both the real and imaginary parts

• Subtract the imaginary part from the real part