SOLUTION: The question asks to write the following term into a + ib form, where “i” is a complex number {{{sqrt(-1)= i}}} : {{{(x+2iy)^2}}}

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: The question asks to write the following term into a + ib form, where “i” is a complex number {{{sqrt(-1)= i}}} : {{{(x+2iy)^2}}}       Log On


   

Question 618434: The question asks to write the following term into a + ib form, where “i” is a complex number sqrt%28-1%29=+i :
%28x%2B2iy%29%5E2
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

%28x%2B2iy%29%5E2+=+%28x%2B2iy%29%28x%2B2iy%29

 x^2 + 4ixy -4y^2