Question

Find the product of (3 + 6i)(4 - 7i)

Answer 1

is it 54 + 3i?

Answer 2

Maybe. How did you get that?

Answer 3

Just imputted it into my trusty calculator

Answer 4

Is that correct?

Answer 5

Does your calculator lie?

Can you just multiply the binomials?

Answer 6

So it is lying?

Answer 7

Part of the learning of mathematics is confidence. If you perform correctly, in a manner that can be followed and reproduced, be satisfied with your result and move on.

Did you do anything wrong on purpose?

Answer 8

Nope it isn't. Just did the problem.

Answer 9

I foiled the equation. Thanks.

Answer 10

(3 + 6i)(4 - 7i) = 12 - 21i + 24i - 42i^2
= 12 - 21i + 24i + 42
= 12 + 3i + 42
= 54 + 3i

There you have it.