## anonymous one year ago (−3 + 2i) • (2 + i)

1. anonymous

Do you know foil?

2. anonymous

yeah kinda i guess

3. anonymous

that's really all this is. and then when you multiply i * i, it's -1

4. anonymous

ohh okay thank you

5. anonymous

no problem. tag me if you need more help or want to get your answer checked

6. anonymous

okay imma solve it now

7. anonymous

o would be -3i?

8. anonymous

no. what did you get when you multiplied, before you combined?

9. anonymous

huh

10. anonymous

what did you get from foil?

11. anonymous

im asking abou the o the f is 6 but i dont know the rest

12. anonymous

oh, ok. Sorry, I thought you were saying that the final answer was -3i. That's right for O. F is -6.

13. anonymous

okay and i is 4i?

14. anonymous

yes

15. anonymous

what would L be??

16. anonymous

$2i \times i = 2i^2 = 2(-1) = -2$

17. anonymous

so when you add them all up you have $-6-3i+4i-2$ and you just have to combine like terms

18. anonymous

19. anonymous

combine the i's and combine the constants. Don't mix them (-3i + 4i) + (-6 - 2) i - 8 is your answer

20. anonymous

or rather -8 + i is the order it's usually written in

21. anonymous

okay thank you

22. anonymous

you're welcome