## Precalculus (6th Edition) Blitzer

A complex number is also called an imaginary number. The standard form of the complex number is $\left( a+bi \right)$, where $a$ is a real part and $b$ is an imaginary part. Like terms are the terms which have the same variable and exponent. To add the two complex numbers, add the real part with a real part and add the imaginary part with an imaginary part. To subtract the two complex numbers, subtract the real part with a real part and subtract the imaginary part with an imaginary part. This means that to perform the operation of addition or subtraction, first combine the like terms. Therefore, the provided statement makes sense.