Imaginary and Complex Numbers Adding Subtracting

Simplify.

(9 +21i) + (-7 - 15i)

• 2+6i

• -2-6i

• 16+36i

• -16-36i

Tags

CCSS.HSN.CN.A.2

Select all that are true.

• √ -1 is an imaginary number

• There are no real numbers that satisfy the equation x=√-1.

• Because √-1 is imaginary, we cannot do math with it.

• The equation x²=-1 has real solutions.

• √-1 = -1 because -1⋅-1 = -1

Tags

CCSS.HSN.CN.A.1

Find all solutions to each equation, real or imaginary.

x²=-36

• 6,-6

• 6

• -6

• 6i, -6i

Write the expression in the form of a+bi, where a and b are real numbers.

3 ⋅ √-25

• 15

• -15

• 15i

• -15i

Tags

CCSS.HSN.CN.A.1

• A
• B
• C
• D

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CCSS.HSN.CN.A.2

Choose the correct answer for the operation pictured.

• 7 - 13i

• 7 - i

• 1 - 13i

• 1 - i

Tags

CCSS.HSN.CN.A.2

Choose the correct answer for the operation pictured.

• 7-13i

• 7-i

• 1-13i

• 1-i

Tags

CCSS.HSN.CN.A.2

• A

• B

• C

• D

Tags

CCSS.HSN.CN.A.2

• A
• B
• C
• D

Tags

CCSS.HSN.CN.A.2

• A
• B
• C
• D

Tags

CCSS.HSN.CN.A.1