What is the product of [x - (4+13i) ][x - (4+13i) ]

x^2 - (4+13i) ^2

Step-by-step explanation:

This product has the form (a-b) (a+b), which is a 'special product' equal to a^2 - b^2. Following this pattern, [x - (4+13i) ][x - (4+13i) ] = x^2 - (4+13i) ^2. The 2nd term could be expanded if desired, but the above result is the most compact one possible.