Typo in Complex Numbers section

[kikoeta]

Hi there, there's a typo for the Complex Numbers section in the Arithmetic of Complex Numbers subsection under the absolute value of a complex number. "One chacks that | zw | = | z |·| w |" should most likely be "checks", unless you wanted to refer to a small bite of food in Scottish slang. Thanks!

In reference to version 224734d7be7ff0c4a8adb3a206356ea122112f33