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Semmy [17]
2 years ago
9

If x = (7+4√3), then the value of x^2 + 1/x^2 is​

Mathematics
1 answer:
Blizzard [7]2 years ago
5 0

Answer:

194.

Step-by-step explanation:

x = (7+4√3)

x^2 =  x = (7+4√3)^2

= 49 + 48 + 56√3

= 97 + 56√3

x^2 + 1/x^2 =    97 + 56√3 + 1/(97 + 56√3)

= 194.

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Oxana [17]

Answer:

12√2.

Step-by-step explanation:

You can do this by the Pythagoras theorem:

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x^2 = 20^2 - (4sqrt7)^2

      = 400 - 112

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2 years ago
Translate each of the following verbal sentences into an algebraic expression or equation
Mrac [35]

Answer:

Let the number be x.

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4 0
3 years ago
The area of a rectangle is 504 square meters. If the perimeter is 90 meters, find the length and width of the rectangle.
o-na [289]

Answer:

Length =24m and width = 21m

Step-by-step explanation:

Given,

Area of rectangle, A = 504 m^2

Perimeter of rectangle, P = 90 m

Since we know, A = Length * width  and  P = 2(Length + width)

So, A = L * w

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And P = 2(L + w)

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or 45 = 504/w  +  w

or 45 = (504 + w^2 ) / w

or 45w = 504 + w^2

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On solving above quadratic equation we get:

w = 21 or 24

So we take width , w= 21 meter

Then length will be, L =504/21 =24 meter

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5 0
3 years ago
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antoniya [11.8K]

Answer:

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P(5

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Vesnalui [34]

Answer:

0

Step-by-step explanation:

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3 years ago
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