Imaginary

Simplify √-4

• 2i

• -2i

• 2

• 4i

Simplify √-23

• -√23

• 23i

• 23

• i√23

Simplify √-1

• 1

• -i

• -1

• i

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

• -2+6i

• 12+6i

• -35-16i²

• -35 -16i

• 10
• -10
• 10i
• -10i

What letter usually represent imaginary number?

• a

• i

• j

• x

• e

Answer explanation

What does i² =  ?

• 1

• -1

• √-1

• √1

What is the value of i^2?

• 1

• 2

• 0

• -1

Answer explanation

The value of i^2 is -1 because i is defined as the square root of -1.

What does i² = ?

• -1

• √-1

• 1

• -√1

(3i)(-2+4i)

• -6+12i

• -12-6i

• -2+7i

• 12+6i