How do you simplify (-1-8i)+(4+3i) and write in a+bi form?

1 Answer
Jan 2, 2016

(-1-8i)+(4+3i)=3-5i

Explanation:

When adding complex numbers given in a+bi form, we add real parts and imaginary parts separately:

(-1-8i)+(4+3i)=-1+4-8i+3i=
=(-1+4)+(-8+3)i=3-5i

We could think about complex numbers as vectors on the complex plane, where real part is on x axis and imaginary part is on y axis.