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Elis [28]
2 years ago
12

What are the solutions of x^2-4x+5=0

Mathematics
2 answers:
Gnoma [55]2 years ago
7 0

Answer:

Factor {x}^{2}-4x-5x

​2

​​ −4x−5.

(x-5)(x+1)=0(x−5)(x+1)=0

2 Solve for x.

x=5,-1x=5,−1

Step-by-step explanation:

erma4kov [3.2K]2 years ago
3 0

Answer:

x=2+i or x=2-i

Step-by-step explanation:

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Simplify eighth root of y squared
NARA [144]

Answer:

<u>The simplified expression is y raised to the 2/8 power</u>

Step-by-step explanation:

Let's recall that one of the properties of fractional exponents is:

x ^ a/b = ᵇ√x ᵃ

​​ therefore,

⁸√y² = y ^2/8

<u>The simplified expression is y raised to the 2/8 power</u>

​

​​

5 0
3 years ago
How to i expand this ? x3 (3x - 5)
Nikitich [7]
Use the distributive formula

a(b - c) = ab - ac

x^3(3x - 5) = \boxed{\bf{3x^4 - 5x^3}}
5 0
3 years ago
In a right-angled triangle, the hypotenuse is 113 and a leg is 112.
melomori [17]

Answer: 15

Step-by-step explanation: Use the formula: a^{2}+b^{2}=c^{2}

Remember c^{2} should always be the hypotenuse or the longest side.

112^{2}+b^{2}=113^{2} ---> evaluate the exponents

12544+b^{2}=12769 ----> subtract 12544 to the other side

b^{2}=225 ---> take the square root of both sides

b=15

7 0
3 years ago
A cylindrical stool has a base of diameter 70cm and height 25cm.find the cost of painting 50 such atools.,if the cost per m2 is
Talja [164]
It would be 32cm because the diameter corresponding
6 0
3 years ago
An ornithologist has 4 bird feeders at separate locations. She wonders if birds are equally likely to visit each of the feeders.
Marianna [84]

Answer:

the x² test statistic 13.71

Option a) 13.71 is the correct answer.

Step-by-step explanation:

Given the data in the question;

Feeder                     1      2      3       4

Observed visits; o_i  60   90   92    58

data sample = 300

Expected e_i = 300 / 4 = 75

the x² test statistic = ?

X^2_{stat = ∑[ (o_i - e_i)²/e_i]

X^2_{stat = [ (60 - 75)² / 75 ] + [ (90 - 75)² / 75 ] + [ (92 - 75)² / 75 ] + [ (58 - 75)² / 75 ]

X^2_{stat = [ 3 ] + [ 3 ] + [ 3.8533 ] + [ 3.8533 ]

X^2_{stat = 13.7066 ≈ 13.71

Therefore, the x² test statistic 13.71

Option a) 13.71 is the correct answer.

7 0
2 years ago
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