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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
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