Tutorial - Combining complex numbers ex 7, (7 + 9i) + (-5i)

The video tutorial explains how to combine complex numbers through addition and subtraction. It begins by introducing the concept of complex numbers, which consist of real and imaginary components. The tutorial then provides a detailed example of adding two complex numbers, demonstrating how to combine the real parts and the imaginary parts separately. The process is illustrated step-by-step, leading to the final result of the addition. The tutorial concludes with a summary of the steps involved in adding complex numbers.

What is the standard form of a complex number?

• a / bi

• a * bi

• a - bi

• a + bi

When combining complex numbers, which parts can be added or subtracted?

• Both the real and imaginary parts

• Only the imaginary parts

• Neither the real nor imaginary parts

• Only the real parts

In the example, what is the real component of the complex number 7 + 9i?

• 7

• 9

• 0

• 5

How is the imaginary part of the complex number 9i - 5i combined?

• 9i / 5i

• 9i * 5i

• 9i - 5i

• 9i + 5i

What is the result of adding the complex numbers 7 + 9i and 0 - 5i?

• 7 - 4i

• 0 + 4i

• 7 + 4i

• 7 + 14i