A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 4 years ago
simplify...pic is in comment box
anonymous
 4 years ago
simplify...pic is in comment box

This Question is Closed

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1342297466944:dw

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0\((a+bi)(c+di)=(acbd)+(ad+bc)i\) either that, or multiply out using four multiplications like you would with \((x+2)(x+5)\) and then at the end replace \(i^2\) by \(1\)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0here \(a=10,b=3, c=5,d=2\) so first method gives \[(10\times 53\times (2))+(10\times (2)+3\times 5)i\]

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0sorry but im still having trouble understanding

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0I just FOILed and then combined like terms. So, 10 x 5 = 50, 10 x 2i = 20i, 3i x 5 = 15i, and 3i x 2i = 6i^2. Combining like terms gets me 50  5i 6i^2, but we then remember that i^2 = 1, so further simplifying becomes 50  5i + 6 > 56  5i. Did that make sense?
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.