Question

What is the correct value of (-4+9i) + (-2-7i)

Answer 1

In order to add these two complex numbers, we need to add the real parts together and the imaginary parts together.

The real part is the number without the "i", and the imaginary part is the number together with the "i".

So we have:

`\begin{gathered} (-4+9i)+(-2-7i)\\ \\ =-4+9i-2-7i\\ \\ =(-4-2)+(9i-7i)\\ \\ =-6+2i \end{gathered}`