Question

Find the product of the complex number and its conjugate. 1 + 2i

Answer 1

You have complex number 1+2i. Conjugate is (1-2i). Can you multiply them and see what itsimplifies to?

Answer 2

1-4i?

Answer 3

Can you show how you multiplied them?

Answer 4

(1+4i) (1-4i) Foiled them so
1-2i
2i-4i
=1-4i

Answer 5

Where did 2i come from?

Answer 6

and I meant to put (1+2i)(1-2i) above instead of the (1+4i) (1-4i) oops

Answer 7

okay the mistake u r making is