Download File - Graphing Calculator by Mathlab: User Manual

2.14 Complex Numbers
Imaginary Number Key (i)
Other keys available on this button: Re, Im, conj, arg.
Tap the i key once to use the imaginary number (i) key. Use this key when performing operations on complex numbers.
Examples:
Simplify the following:
1. (2 – 3i) + (6 + 4i)
2. (2 – 3i) (6 + 4i)
3. (2 – 3i) (6 + 4i)
3 + 5i
Calculator Solutions:
Enter one expression per line.
1. Tap these keys in order: (, 2, –, 3, i, ), +, (, 6, +, 4, i, )
2. Tap these keys in order: (, 2, –, 3, i, ), (, 6, +, 4, i, )
3. Tap these keys in order: (, 2, –, 3, i, ), (, 6, +, 4, i, ), /, (, 3, +, 5, i, )
Real Number Part Function (Re)
Tap the i key twice to use the Re function. Given a complex number, this function will determine the real number part.
Examples:
In each complex number below, identify the real number.
1. 3 + 4i
2. 15i
Calculator Solutions:
1. Tap these keys in order: double tap i, (, 3, +, 4, i, )
2. Tap these keys in order: double tap i, 1, 5, i