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Jet001 [13]
2 years ago
15

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
Mathematics
1 answer:
lisabon 2012 [21]2 years ago
7 0

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.

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Step-by-step explanation:

We can model the annual consumption of iron by the equation

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An estimate for the total consumption of iron can now be obtained by integrating this equation with respect to a dummy variable, x from 0 to n.

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6 0
2 years ago
Priya has completed 9 eczema questions.THis is 60% of the questions on the exam? how many questions are on the exam?
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Answer:

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plz mark me as brainliest.

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Make sure to double check, but I think this is the answer.

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