Complex numbers are written in the form a + bi, where a is the real part and bi is the imaginary part. The imaginary unit i is defined as β(-1), which means iΒ² = -1.
Simply combine the "like terms". Add the real parts together, and add the imaginary parts together. Ex: (2+3i) + (4+5i) = 6+8i
Multiply complex numbers using the FOIL method, but remember that iΒ² = -1. Ex: (2i)(3i) = 6iΒ² = -6
The conjugate of a + bi is a - bi. Multiplying a complex number by its conjugate always results in a real number.
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