Math

(sqrt 5)/(2 - sqrt 5)

  1. 👍 0
  2. 👎 0
  3. 👁 103
  1. √5/(2-√5) ??
    what about it?

    If you are rationalizing it, then

    = √5/(2-√5) * (2+√5)/(2+√5)
    = (2√5 + 5)/(4-5)
    = -2√5 - 5

    1. 👍 0
    2. 👎 0
  2. Thanks, but can you please verify how you got the (2√5 + 5)? Because I thought that √5 * (2+√5) would be 2√25.

    1. 👍 0
    2. 👎 0
  3. Just like
    3(2x+5) = 6x + 15
    just like
    3(7+2) = 21 + 6
    so is

    √5(2+√5)
    = 2√5 + √25
    = 2√5 + 5

    you could also check by evaluating it with your calculator.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Math:)

    A person is on the outer edge of a carousel with a radius of 20 feet that is rotating counterclockwise around a point that is centered at the origin. What is the exact value of the position of the rider after the carousel rotates

  2. algebra

    Simplify: 2 sqrt (3) + 6 sqrt(2) - 4 sqrt(3) + sqrt (2) a) 8 sqrt(2) - 3 sqrt(3) b) 6 sqrt(2) - 8 sqrt(3) c) 5 sqrt(6) d) 7 sqrt(2) - 2 sqrt(3) the answer i picked was d

  3. algebra

    am I right? 1. Simplify radical expression sqrt 50 5 sqrt ^2*** 2 sqrt ^5 5 sqrt ^10 5 2. Simplify the radical expression sqrt 56x^2 28x 2x sqrt 14*** 2x sqrt 7 sqrt 14x2 3. Simplify the radical expression. sqrt 490y^5w^6 2 sqrt

  4. Math

    1. The length of the hypotenuse of a 30-60-90 triangle is 7. Find the perimeter. A) 7/2+21/2 sqrt 3 B) 21+7 sqrt 3 C) 7+21 sqrt 3 D) 21/2 + 7/2 sqrt 3 Could someone please help me, I don't know how to do this. Thank you!

  1. Math

    Which is the exact value of the expression sqrt 32- sqrt 50 + sqrt 128 2 sqrt 7 7 sqrt 2 22 sqrt 2 2 sqrt 55

  2. Algebra 2

    Simplify the number using the imaginary unit i. (sqrt)of -28 •2(sqrt)-7 •-2 (sqrt)-7 •i (sqrt)28 •2i (sqrt)7

  3. Math

    f(x)= 4-x^2 and g(x)= sqrt (x) find the implied domain of fg(x) fg(x)= f(sqrt(x)) fg(x)= 4-(sqrt(x))^2 fg(x)=4-(sqrt x)(sqrt x) fg(x)=4-x domain= (x:x=all real numbers) Am I correct?

  4. Calculus

    Evaluate the integral by changing to spherical coordinates. The outer boundaries are from 0 to 1. The middle one goes from -sqrt(1-x^2) to sqrt(1-x^2) The inner one goes from -sqrt(1-x^2-z^) to sqrt(1-x^2-z^) for

  1. is this correct?- math

    find the domain of the real valued function; f(x) = sqrt(5 - (sqrtx)) my solution: 5 - (sqrt x) >=0 -(sqrt x) >= -5 (sqrt x)

  2. Pre Calculus

    What is the standard form of a hyperbola given the vertices (1+3 sqrt 15 , -7) , (1-3 sqrt 15 , -7) and Endpoints of conjugate axis (1 , -7+5 sqrt 5) , (1 , -7-5 sqrt 5)?

  3. Math sequence

    Let {An} be the sequence defined recursively by A1=sqr(2) and A(n+1) = sqr(2+An) for n is bigger and equal to 1. Show that An < 2. What is An? and how do I find it? Thank you for your time. An is the nth number in the sequence,

  4. Pre Calculus

    What is the standard form of a parabola given the vertices (1+3 sqrt 15 , -7) , (1-3 sqrt 15 , -7) and Endpoints of conjugate axis (1 , -7+5 sqrt 5) , (1 , -7-5 sqrt 5)?

You can view more similar questions or ask a new question.