+The **imaginary unit**, denoted *i*, is a fundamental mathematical concept that extends the [Real Numbers](/wiki/Real_Numbers) to form the [Complex Numbers](/wiki/Complex_Numbers). It is uniquely defined by the property *i*² = -1, allowing solutions to equations that are impossible within real numbers alone.
+## See also
+- [Complex Numbers](/wiki/Complex_Numbers)
+- [Real Numbers](/wiki/Real_Numbers)
+- [Number System](/wiki/Number_System)
... 1 more lines