This video tutorial explains how to add and subtract complex numbers by treating the imaginary unit 'i' like a variable. It provides three examples, demonstrating the process of distributing signs and combining like terms to simplify expressions. The tutorial emphasizes writing the real part first and the imaginary part second in the final answer.

What is the main idea when adding and subtracting complex numbers?

• Treat 'i' as a constant.

• Treat 'i' as a variable.

• Ignore 'i' completely.

• Convert 'i' to a real number.

In the expression 8 - 3i + 5 - 6i, what is the result of combining the real parts?

• 3

• 13

• 8

• 5

In the expression 8 - 3i + 5 - 6i, what is the result of combining the imaginary parts?

• -9i

• 9i

• -3i

• -6i

What is the simplified form of 8 - 3i + 5 - 6i?

• 13 + 9i

• 3 + 9i

• 3 - 9i

• 13 - 9i

In the expression 10 - 7i + 3 + 4i, what should you be careful about when distributing?

• Changing the signs of the real numbers.

• Changing the signs of the imaginary numbers.

• Not changing any signs.

• Changing the signs of both real and imaginary numbers.

What is the result of combining the real parts in 10 - 7i + 3 + 4i?

• 10

• 7

• 13

• 3

What is the result of combining the imaginary parts in 10 - 7i + 3 + 4i?

• -3i

• 1i

• -11i

• 7i

What is the simplified form of 10 - 7i + 3 + 4i?

• 7 + i

• 7 - i

• 13 - i

• 13 + i

In the expression 3i - 4 - 2i + 5 + 9i, what is the result of combining the real parts?

• 0

• -1

• 1

• 9

What is the result of combining the imaginary parts in 3i - 4 - 2i + 5 + 9i?

• 9i

• 12i

• 1i

• 10i