In 3-5 sentences. describe why real numbers and purely imaginary numbers are also complex numbers composed of real and imaginary parts. Also, describe how to identify the real part versus the imaginary part of a complex number. Answer like a 11th-grader.
Real numbers are complex numbers because they have an imaginary part of zero. Purely imaginary numbers are also complex because their real part is zero. We can identify the real part of a complex number by looking at the coefficient of the variable without an i, while the imaginary part is determined by the coefficient of the variable with the i. Simplifying the expression would also help identify the real and imaginary parts.
