Tutorial - How do we multiply complex numbers ex 13, (8 + i)(7 + 2i)

The video tutorial introduces the box method for multiplying binomials and trinomials, likening the process to calculating the area of a rectangle. The instructor demonstrates setting up a box divided into quadrants, placing terms along the top and side, and multiplying to find the area of each box. The tutorial covers simplifying and combining like terms, particularly focusing on complex numbers, and concludes with writing the final answer in the form of A + BI.

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