lilday12
  • lilday12
Multiply the complex numbers. (6 + 4i)(5 - 9i)
Algebra
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
mathmale
  • mathmale
Be sure you're familiar with the following: real times real number produces a real product. Thus, 6*5 = 30. Real times imaginary => imaginary product. Imaginary quantity times imaginary quantity: The product will be -1. Example: 3i * 2i=-6
mathmale
  • mathmale
Following these rules, find the product (6 + 4i)(5 - 9i). Please show your work.
anonymous
  • anonymous
6(5) + 6(-9i) +4i(5) + 4i(-9i) using the foil method which gives you = 30 + -54i + 20i + -36i^2 now remove the i^2: -36i^2 = 36 since i^2 = -1 you just multiply -36(-1) giving you 36 leaving you with: 30 + 36 -54i + 20i So you end up with -34i + 30 + 36 = (66 - 34i) <--- final answer

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

anonymous
  • anonymous
best response please.
anonymous
  • anonymous
He confirmation my work is correct http://www.wolframalpha.com/input/?i=%286+%2B+4i%29%285+-+9i%29
mathmale
  • mathmale
@lugerm: your obvious know-how is important and is appreciated. However, OpenStudy is a teaching site whereby our focus is to help others in the process of solving problems themselves. Unfortunately, you and @lilday12 were not involved in any two-way dialogue at all; rather, you did the work for him / her and then requested a medal for having done so. This is not teaching worthy of a medal.
anonymous
  • anonymous
i just started today so can i do the work then ask them to work out the answer?
anonymous
  • anonymous
@mathmale

Looking for something else?

Not the answer you are looking for? Search for more explanations.