Solving Imaginary Numbers

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Simplify.

• -5i

• 5

• 5i

• -5

Solve by taking square roots:

2b² - 4 = -166

• b = 9i, b = -9i

• b = 3, b = -3

• b = 9, b = -9

• b = 3i, b = -3i

x² + 4 = -77

• 9i

• -9i

• No solution

• ±9i

• 10
• -10
• 10i
• -10i

What is the value of x?

• 10

• -10

• 10i

• -10i

What is the value of x if x = 10?

• 10

• -10

• 10i

• -10i