If x²-5x +1 =0, what is the value of - d="TexFormula1" title="(x + \frac{1}{x} ) " alt="(x + \frac{1}{x} ) " align="absmiddle" class="latex-formula">
2 answers:
<h3>
Answer: 5 </h3>
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Work Shown:
x^2 - 5x + 1 = 0
x^2 + 1 - 5x = 0
x^2 + 1 = 5x
(x^2 + 1)/x = 5 .... where x is nonzero
(x^2)/x + (1/x) = 5
x + (1/x) = 5
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An alternative method involves solving the original equation using the quadratic formula. After you get the two roots x = p and x = q, you should be able to find that p + 1/p = 5 and also q + 1/q = 5 as well.
In this case,
p = (5 + sqrt(21))/2
q = (5 - sqrt(21))/2
Answer:
5
Step-by-step explanation:
Since this equation is not factorable, you can either use the quadratic formula, graph and look for its zeros, or other methods to get it's zeros.
But using the quadratic formula which always spits out a x value gives me:
4.791 and 0.209 .
Now let's test both of these values since we have two x values.
≈5 (4.9999)
and
≈5 (4.9936)
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Step-by-step explanation:
Answer:
B
Step-by-step explanation:
The slope is 4.
Let's find the slope between your two points.
(1,−2); (3,6)
(x1,y1) = (1,−2)
(x2,y2) = (3,6)
Use the slope formula:
m = y2−y1 / x2−x1
= 6− −2 / 3−1
= 8 / 2
= 4
Answer:
m = 4
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Step-by-step explanation:
because you distribute the 7 to the x and the 8 first then you bring that down which becomes 7x+56 then you to the addition so you do 56+-2 which would give you 54.
Answer:
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Step-by-step explanation:
To work this out we need to find the highest multiple of 45 and 60.
15 is the largest number that goes into both of them so what we are going to do now is divide both number by 15.
45 divided by 15 = 3
60 divided by 15 = 4
Therefore the odds of selecting a red candy is 3:4.
Hope that helps. x
Answer:
Aloha,
Hope you are having a wonderful day, y=1.5x-1 is your answer. Hope this helps.
noʻu ka hauʻoli