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Talja [164]
3 years ago
9

Find a polynomial of degree 2 with real number coefficients and zero 3-2i

Mathematics
1 answer:
marissa [1.9K]3 years ago
4 0
Complex roots occur as conjugates so the other root is 3 + 2i

so we have  the factored form 

(x - (3 - 2i)(x - (3 + 2i)

= (x - 3 + 2i)(x - 3 - 2i)

= x^2 -3x - 2ix - 3x + 9 + 6i + 2ix - 6i- 4i^2

=  x^2 -6x + 9 + 4

= x^2 - 6x + 13   Answer
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If you could please help ASAP it would be greatly appreciated!
klemol [59]

Answer:

A. 20

Step-by-step explanation:

because she has twice as many and if you have twice as many then you'll have 40 so 40+20=60

5 0
3 years ago
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Please help its due at 3 :(
algol13
Don’t do that math anymore soooo sorry
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Find the surface area of a sphere with a radius of 8cm.
Tcecarenko [31]
The answer is B 803.8cm^2

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3 years ago
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Suppose the profit a honda dealership makes on the next 5 accords it sells are:564, 1,000, 848, 1,495, 1,348. calculate the stan
stepladder [879]
First we have to find the mean (average)
mean = (564 + 1000 + 848 + 1495 + 1348) / 5 = 5255 / 5 = 1051

now we subtract the mean from every data point, then square it
564 - 1051 = -487......-487^2 = 237169
1000 - 1051 = -51......-51^2 = 2601
848 - 1051 = -203......-203^2 = 41209
1495 - 1051 = 444......444^2 = 197136
1348 - 1051 = 297......297^2 = 88209

now find the mean of the results.....but know when ur dealing with a sample instead of the whole population, u divide by 1 number less...so instead of dividing by 5, u divide by 4.
(237169 + 2601 + 41209 + 197136 + 88209) / 4 = 566324 / 4 = 
141581.....this is called ur variance

now take the square root of the variance and u have ur standard deviation
sqrt (141581) = 376.272 rounds to 376.27 <==
5 0
3 years ago
Is the square root of 4 plus the square root of 16 rational
Ahat [919]
Yes because square root of 4 is 2 and square root of 16 is 4. 4+2=6
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