2.5, 2.7, 2.9

√-36

• 6
• -6
• -6i
• 6i

(5-2i) + (-7+8i)

• -2+6i
• 12+6i
• -35-16i²
• -35 -16i

(10+3i) - (2-9i)

• 20-27i
• 12-7i
• 8+12i
• 20-27i²

Simplify.
(5-i)(5+i)

• 26
• 24
• 25+i²
• 25-i²

Simplify
(3 + i)(1 - 4i)

• 7 - 11i
• 3 - 4i
• 3 - 11i - 4i²
• 2 - 3i

Solve
x² + 49 = 0

• -7
• -7
• 7i
• ±7i

The expression (2 + 3i)² is equal to

• -5
• -5 + 12i
• 13
• 13 + 12i

What is the complex conjugate of  4-3i?

• A.  1/(4-3i)
• B. 1/(4+3i)
• C.  -4 + 3i
• D.  4 + 3i

Simplify:
i⁷

• i
• -i
• 1
• -1

• A.
• B.
• C.
• D.

Tags

CCSS.HSN.CN.A.3