A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing

This Question is Closed

ilikephysics2
 2 years ago
Best ResponseYou've already chosen the best response.1the foiling method, do you know what that is?

sara1234
 2 years ago
Best ResponseYou've already chosen the best response.0what do you do after (9*9)+(9*5i)+(9*8i)+(8i*5i)

ilikephysics2
 2 years ago
Best ResponseYou've already chosen the best response.1oh i just did it on the calculator, thats all you do there really is no steps

sritama
 2 years ago
Best ResponseYou've already chosen the best response.1do you know the meaning of i ?

sara1234
 2 years ago
Best ResponseYou've already chosen the best response.081+157i i got this and i know its wrong can you khow steps so i can compare?

ilikephysics2
 2 years ago
Best ResponseYou've already chosen the best response.1i gave you the right answer

ilikephysics2
 2 years ago
Best ResponseYou've already chosen the best response.1can i get my metal now ;)

sara1234
 2 years ago
Best ResponseYou've already chosen the best response.0i know you gave me the right answer but i need to know what i did wrong because i didnt get that

hartnn
 2 years ago
Best ResponseYou've already chosen the best response.0i is the square root of 1 so i*i = 1

phi
 2 years ago
Best ResponseYou've already chosen the best response.3(9*9)+(9*5i)+(9*8i)+(8i*5i) 81 +45i +72i+40i^2 i^2 is 1 so 8140 + (45+72)i simplify 41+112i

ilikephysics2
 2 years ago
Best ResponseYou've already chosen the best response.1its 117i, phi you got it wrong

sritama
 2 years ago
Best ResponseYou've already chosen the best response.1@ilikephysics2 is correct

hartnn
 2 years ago
Best ResponseYou've already chosen the best response.0thats why 8i * 5*i = 40 i*i =40 *(1)= 40

sara1234
 2 years ago
Best ResponseYou've already chosen the best response.0i got it thanks guys just one questions why you do 40 ^2

phi
 2 years ago
Best ResponseYou've already chosen the best response.3it is 40 times i*i i^2 which is 1

phi
 2 years ago
Best ResponseYou've already chosen the best response.3so do FOIL, but with the trick that i*i can be replaced with 1

sara1234
 2 years ago
Best ResponseYou've already chosen the best response.0oh thank you @phi so when ever its i*i you have to change it to a negative?

phi
 2 years ago
Best ResponseYou've already chosen the best response.3yes. i is short for sqrt(1) sqrt(1)*sqrt(1)= 1 so keep i's but replace i*i (or i^2) with 1

sara1234
 2 years ago
Best ResponseYou've already chosen the best response.0okay i get it thanks to all
Ask your own question
Ask a QuestionFind 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.