Multiply and simplify the following complex numbers: (1 + 2i) x (1 - 4i)
We can start off by multiplying the pairs together:
2i*-4i=\(-8i^2\). We know that i^2 = -1. So -8i^2 = -8*-1=8
Now, let's add these all together.
1-4i+2i+8 = 9-2i.
I hope this helped you!