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barxatty [35]
3 years ago
11

What are the exact solutions of x2 - 5x - 1 = 0?.

Mathematics
2 answers:
borishaifa [10]3 years ago
8 0
x^2-5x-1=0\\\\a=1;\ b=-5;\ c=-1\\\Delta=b^2-4ac\\\\\Delta=(-5)^2-4\cdot1\cdot(-1)=25+4=29 \ \textgreater \  0\\\\therefore\\x_1=\dfrac{-b-\sqrt\Delta}{2a}\ and\ \dfrac{-b+\sqrt\Delta}{2a}\\\\x_1=\dfrac{5-\sqrt{29}}{2\cdot1}=\boxed{\dfrac{5-\sqrt{29}}{2}}\\\\x_2=\dfrac{5+\sqrt{29}}{2\cdot1}=\boxed{\dfrac{5+\sqrt{29}}{2}}
masya89 [10]3 years ago
5 0

Answer:

Please use math-way

the person below or above is wrong

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Directions: Evaluate the following combinations and determine the value of the
Andru [333]

Answer:

1. C(9,4) : n=9, s=4

2. C(10,5) : r=5

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4. C(7,7) : n=6

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Step-by-step explanation:

4 0
2 years ago
Can anyone help ? i really don’t understand this question <br> If NP bisects X =<br> m/RNM =
snow_tiger [21]

We can conclude that the value of x is (∠MNP + 66)/8 and angle m∠RNM = ∠RNQ - ∠MNP + 78.

<h3>What are angles?</h3>
  • An angle is a figure in Euclidean geometry formed by two rays, called the sides of the angle, that share a common endpoint, called the vertex of the angle.
  • Angles formed by two rays are located in the plane containing the rays.
  • Angles are also formed when two planes intersect.
  • These are known as dihedral angles.

So,

  • ∠MNQ = ∠MNP + ∠PNQ
  • 8x + 12 = ∠MNP + 78
  • 8x + 12 - 78 = ∠MNP
  • 8x - 66 = ∠MNP
  • 8x = ∠MNP + 66
  • x = (∠MNP + 66)/8

Now, substitute 'x = (∠MNP + 66)/8' in 8x + 12:

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  • ∠MNQ = 8 ×(∠MNP + 66)/8 + 12
  • ∠MNQ = ∠MNP + 66 + 12
  • ∠MNQ = ∠MNP + 78

Hence, m∠RNM = ∠RNQ - ∠MNP + 78

Therefore, in the given question value of x is (∠MNP + 66)/8 and angle m∠RNM = ∠RNQ - ∠MNP + 78.

Know more about angles here:

brainly.com/question/25716982

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7 0
1 year ago
Which polynomial is prime?
faust18 [17]
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5 0
3 years ago
Read 2 more answers
What is the closest side lenght of this square? Area=99 square units​
Alex Ar [27]

Answer:

3\sqrt{11}

Step-by-step explanation:

\sqrt{99} = 3\sqrt{11}

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