Returns a complex number raised to a power.
complexnumber is text representing a complex number, for example as a+bi or a+bj. number is a number.
IMPOWER returns complexnumber raised to the power of number. The result is a complex number presented as text.
If complexnumber is and number is n, IMPOWER(complexnumber, number) returns .
returns (1+2i)2 = -3+4i as text.