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3 years ago

Tìm nghiệm của đa thức sau:2x mũ 2-5x-3

Mathematics

1 answer:

Juliette [100K]3 years ago

5 0

Bạn tham khảo cách này nha

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<img src="https://tex.z-dn.net/?f=6%2F5%20%28cos%28120%29%20%2B%20isin%28120%29%29%203%2F5%20%28cos%2845%29%20%2B%20i%20sin%2845

marysya [2.9K]

The product is equal to:

$\frac{18}{25}(cos(165) + i*sin(165))$

<h3>How to solve the product?</h3>

Remember that we can write a complex number in polar form as:

$R*e^{i*a} = R*(cos(a) + i*sin(a))$

Then the given product:

$\frac{6}{5}*(cos(120) + i*sin(120))*\frac{3}{5}*(cos(45) + i*sin(45))$

can be rewritten to:

$(\frac{6}{5}*e^{i*120})*(\frac{3}{5}*e^{i*45})$

Now is easier to solve the product:

$(\frac{6}{5}*e^{i*120})*(\frac{3}{5}*e^{i*45})\\\\= \frac{6}{5} *\frac{3}{5} *e^{i*(120 + 45)}\\\\= \frac{18}{25}*e^{i*165}\\\\= \frac{18}{25}(cos(165) + i*sin(165))$

If you want to learn more about complex numbers:

brainly.com/question/10662770

#SPJ1

4 0

3 years ago

The range of y = Arcsin x is<br> kle<br> A. True<br> B. False

Yuri [45]

Answer:

I guess is

Step-by-step explanation:

False I guess

6 0

3 years ago

How many quarter, a pound burgers can Kristina make out<br> of 75 pounds of ground beef?<br> 1

antoniya [11.8K]

Answer:

1 quarter pound = 0.25 of a pound.

Give that:

Total amount of ground beef = pound

From 3.5 pound of beef we have to make burgers using 0.25 pound of beef in one burger

We have to find how many burgers can be made:

We have to divide 3.5 pound by 0.25 pound

i.e,

⇒14 quarter pounds burger can be made.

Therefore, 14 quarter pound burgers can George make out of 3 1/2 pounds of ground beef

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

The sixth grade debate team has a boy to girl ratio of 3:8. Which of the following ratios is equivalent to this ratio?

hram777 [196]

Answer:

wow this your first Q

Step-by-step explanation:

6 0

3 years ago

Can someone please help meee

Hunter-Best [27]

Answer:

-3/5

Step-by-step explanation:

put down the 5,0 and 0,3 then simply start at the 5,0 and count up how many boxes it takes to get to the three then count left how many boxes it takes to get to 0 so...3/5. then look at the line. its going down which means it is negative. so the slope is -3/5

8 0

2 years ago

Read 2 more answers