sample

• 6 + 3i

• 5i + 4i

• 6 + 4i

• 5 + 3i

Answer explanation

The correct choice is 6 + 4i because it is the sum of (2+3i) and (4+i).

• 4 + 5i

• 4 + 7i

• 8i + 3i

• 15i + 3i

Answer explanation

The correct choice is 4 + 7i because it is the sum of (3+5i) and (1+2i).

Answer explanation

The correct choice is 5+i because when we simplify the expression (10-i)-(5-2i), we get 5+i.

• 10
• -10
• 10i
• -10i

What does i² equal?

• -1

• √-1

• 1

• -√1

Answer explanation

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