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2 years ago

What is the answer to (3-4i)(5+6i)

Mathematics

2 answers:

densk [106]2 years ago

4 0

Answer:

39 - 2i

Step-by-step explanation:

First, you need to FOIL the equation:

$(3 - 4i)(5 + 6i) \\15 + 18i - 20i - 24i^2\\15 - 2i - 24(-1)\\15 - 2i + 24\\39 - 2i\\$

Remember that $i^2$ equals -1.

Therefore, the answer to this question is 39 - 2i

I hope this helps!!

- Kay :)

gulaghasi [49]2 years ago

3 0

(3-4i)(5+6i)

15+18i-20i-24i^2

15+18i-20i+24=

39-2i

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dedylja [7]

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2. 5 in and 4/3 in: Area= 20/3 in^2

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4. 7/6 in and 6/7 in: Area = 1 in^2

Step-by-step explanation:

1. 5 in and 1/3 in

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$Let\\l=5\\w=\frac{1}{3}\\Area=l*w\\=5*\frac{1}{3}\\=\frac{5}{3}\ in^2$

2. 5 in and 4/3 in

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$l= 5\ in\\w=\frac{4}{3}\ in\\Area=l*w\\=5*\frac{4}{3}\\=\frac{20}{3}\ in^2$

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4. 7/6 in and 6/7 in

Let

$l=\frac{6}{7}\\w=\frac{7}{6}\\Area=l*w\\=\frac{6}{7}*\frac{7}{6}\\=1\ in^2$

Hence,

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2. 5 in and 4/3 in: Area= 20/3 in^2

3. 5/2 in and 4/3 in: Area=10/3 in^2

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Keywords: Rectangle, Area

Learn more about rectangles at:

#LearnwithBrainly

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