Question 157802
{{{12.55=(1 + i)^4}}} Start with the given equation



{{{root(4,12.55)=1 + i}}} Take the fourth root of both sides to eliminate the exponent 4



{{{1.882=1 + i}}} Take the fourth root of 12.55 to get 1.882 (note: this is an approximate value)



{{{1.882-1= i}}} Subtract 1 from both sides



{{{0.882= i}}} Subtract 



So the solution is approximately {{{i=0.882}}}