A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
multiply: (1+2i)(2i)
anonymous
 5 years ago
multiply: (1+2i)(2i)

This Question is Closed

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i am so lost on where to start with this problem

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0this is 8th grade math right?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0intermediate algebra. would i answer it the same if it was 'x' instead of 'i'

watchmath
 5 years ago
Best ResponseYou've already chosen the best response.0You just apply the distributive property \(1\cdot 2+1\cdot (i)+2i\cdot2+2i\cdot (i)\)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Just foil it out like you would normally (treat the i kinda like a variable) and just remember that if you have an \(i^2\) that equals 1

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0oh okay!! thanks! i wasnt sure if i just fouil like normal. the "i" threw me off!

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0don't be scared of letters. They're actually much easier to work with than numbers because you don't have to plug them into your calculator ;)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0thank you. i got 21i+4i2i so far

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.02+3i2i as the answer

watchmath
 5 years ago
Best ResponseYou've already chosen the best response.0\(21i+4i2i^2\). Now you can use \(i^2=1\)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.02+3i2i^2 ..which would be 2+3i+2

watchmath
 5 years ago
Best ResponseYou've already chosen the best response.0good! you can combine 2+2 as well
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.