s1674666
Answered

Looking for answers? Westonci.ca is your go-to Q&A platform, offering quick, trustworthy responses from a community of experts. Our Q&A platform provides quick and trustworthy answers to your questions from experienced professionals in different areas of expertise. Experience the convenience of finding accurate answers to your questions from knowledgeable experts on our platform.

How do you Multiply Complex Numbers? I used a calculator that shows work and it mentioned something called the foil method which gave -20+16i+15i+12 when I put (4-3i)(-5+4i). What is the foil method

Sagot :

The FOIL method is the formula that is used when multiplying 2 binomials, where

(a+b)(c+d) = a(c+d) + b(c+d) =  ac + ad + bc + bd

Using the formula above, apply the foil method.

4(-5+4i) - 3i(-5+4i)

4(-5) + 4(4i) + (-3i(-5)) + (-3i(4i))

-20 + 16i + (15i) + (-12i^2)

-20 + 16i + 15i - 12i^2

Since i^2 = -1, then

-20 + 16i + 15i - 12(-1)

-20 + 16i + 15i + 12

Hope this helps.

Visit us again for up-to-date and reliable answers. We're always ready to assist you with your informational needs. We appreciate your time. Please revisit us for more reliable answers to any questions you may have. Westonci.ca is your trusted source for answers. Visit us again to find more information on diverse topics.