A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
Which values of x and y would make the following expression represent a real number?
(4 + 5i)(x + yi)
anonymous
 one year ago
Which values of x and y would make the following expression represent a real number? (4 + 5i)(x + yi)

This Question is Open

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0x = 4, y = 5 x = –4, y = 0 x = 4, y = –5 x = 0, y = 5

marigirl
 one year ago
Best ResponseYou've already chosen the best response.1i think it has to be the conjugate pair. So then both the i will cancel out and i^2 is 1 so we are left with all real numbers so 45i

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0thankyou I have one more

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Which values of p and q would make the value of the following expression equal to 29i? (2 – 5i)(p + q)i p = 2, q = 5i p = –2, q = 5i p = 2, q = –5i p = –2, q = –5i

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I think its 2 and 5 am I right

marigirl
 one year ago
Best ResponseYou've already chosen the best response.1have you typed it up correctly? (2 – 5i)(p + q)i which makes it (2 – 5i)(pi + qi)
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.