Operations with Complex Numbers

What is the imaginary unit 'i' defined as?

• The square root of 1

• The square root of -1

• The square of -1

• The square of 1

Tags

CCSS.HSN.CN.A.1

How would you simplify the square root of -16?

• -4

• -4i

• 4i

• 4

What is the simplified form of the square root of -50?

• 10√2

• 5i√2

• 5√2

• 10i

How do you add the complex numbers (-6 + 5i) and (3 - 2i)?

• -9 + 7i

• -3 + 3i

• -3 + 7i

• -9 + 3i

Tags

CCSS.HSN.CN.A.2

What is the result of subtracting (7 + 2i) from (3 - 4i)?

• -10 - 6i

• -4 - 6i

• -4 - 2i

• -10 - 2i

Tags

CCSS.HSN.CN.A.2

What is i squared equal to?

• 1

• -1

• i

• -i

Tags

CCSS.HSN.CN.A.1

What is the product of 4i and -6?

• 24

• 24i

• -24

• -24i

Tags

CCSS.HSN.CN.A.2

What is the result of multiplying (4i) and (i)?

• -4

• 4i

• -4i

• 4

Tags

CCSS.HSN.CN.A.2

Using the FOIL method, what is the first step in multiplying (9 - 2i) and (-4 + 7i)?

• -2i * -4

• -2i * 7i

• 9 * -4

• 9 * 7i

Tags

CCSS.HSN.CN.A.2

What is the result of multiplying (2i + 4) and (-8 - 7i) using the FOIL method?

• -18 + 64i

• -18 - 64i

• -18 + 56i

• -18 - 56i

Tags

CCSS.HSN.CN.A.2