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3241004551 [841]
3 years ago
8

write a polynomial with the zeroes: 5, -3, and -1+2x. I just need help with getting rid of the i. please help me.

Mathematics
1 answer:
ch4aika [34]3 years ago
5 0
(x-5)(x+3)(x-(-1+2i))(x-(-1-2i))= (complex conjugate)

x² - x( -1+2i) - x(-1-2i) + (-1+2i)(-1-2i)
x² - x(-1+2i -1-2i) + (1+2i -2i +4) ---> because i² = -1 
x² - x(-2) + (5) = x² + 2x +5 

(x-5)(x+3)(x² + 2x +5)=
(x² -2x-15)(x² + 2x +5)=
x^4 -14x² -40x-75 


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Can the sum of two mixed numbers be equal to 2.Explain why or why not
Verdich [7]

Answer:

yes

Step-by-step explanation:

yes. because 1 and 1/2 added to 1/2 equals 2.

but...

some say Only if you include negatives.

6 0
3 years ago
Can someone please help me asap
Liono4ka [1.6K]
Hi there!

Thanks for asking for help!

I believe Part A of your answer is the expression: n+2n.
Because that is the answer for Part A, Part B is the answer: "The expression for the bookcases is n+2n because the problem says 'the larger bookcase holds twice as much as the smaller one,' and 'let n represent the amount of books the smaller bookcase holds'.
Since you need to find an expression for the amount both bookcases needs to hold you would add n (capacity of the smaller bookcase) and 2n (capacity of the larger bookcase) together to have an expression that represents the amount both hold.
Part C: 90=3n
I know this is the correct equation based on the expression written above since n+2n=3n, and the problem says "the amount both bookcases hold together is 90 books"

btw, bookcase 1 holds 30 books and the large bookcase holds 60.

Hope this helps you out! :)



6 0
3 years ago
Solve and write solution in interval notation 4(x+1)+3>x-5
soldi70 [24.7K]

Answer:

\large\boxed{x\in\left(-\dfrac{13}{3},\ \infty\right)}

Step-by-step explanation:

4(x+1)+4>x-5\qquad\text{use the distributive property}\\\\4x+4+4>x-5\\\\4x+8>x-5\qquad\text{subtract 8 from both sides}\\\\4x>x-13\qquad\text{subtract}\ x\ \text{from both sides}\\\\3x>-13\qquad\text{divide both sides by 3}\\\\x>-\dfrac{13}{3}\to x\in\left(-\dfrac{13}{3},\ \infty\right)

3 0
3 years ago
What is the value of x?<br><br> sin55°=cosx<br><br> Enter your answer in the box.<br><br> x = <br> °
rodikova [14]

ANSWER

x=35°

EXPLANATION

The sine and cosine ratio are complementary trigonometric ratios.

This means that:

sin(A)°=cos(90-A)°

The given equation is:

sin(55)°=cos(x).

This implies that,

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x=35°

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3 years ago
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Firlakuza [10]

Answer:

Y = 5.5x

The constant is 5.5

since no matter what y and x are there will always be a 5.5 difference

Also mark brainliest please

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3 years ago
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