Algebra

are these correct?

Simplify.

1. 3 + sqrt8/ 2 - 2 sqrt8
simplified: - 8 * sqrt2 + 11 / 14

2. 4/ sqrt5 - sqrt3 - 4/ sqrt5 + sqrt3
simplified: 4 sqrt3

  1. 👍 0
  2. 👎 0
  3. 👁 88
  1. the first one looks good, but I can't parse the second.
    You really need to use parentheses when typing rational expressions online.

    1. 👍 0
    2. 👎 0
    posted by Steve
  2. 2. (4/ sqrt5 - sqrt3) - (4/ sqrt5 + sqrt3)
    simplified: 4 * sqrt3

    1. 👍 0
    2. 👎 0
  3. still not good enough

    you probably meant

    4/(√5 - √3) - 4/(√5 + √3) , in that case form a common denominator ....
    = ( 4(√5 + √3) - 4(√5 - √3) )/( (√5 + √3)(√5 - √3) )
    = (4√5 + 4√3 - 4√5 + 4√3)/(5-9)
    = 8√3/-4
    = -2√3
    check my arithmetic

    1. 👍 0
    2. 👎 0
    posted by Reiny
  4. maybe you mean
    4/(sqrt5-sqrt 3) - 4/(sqrt5+sqrt3) ???
    [4(sqrt 5 +sqrt 3) - 4(sqrt 5 -sqrt 3)]/(5-3)

    (4/2) (2 sqrt 3)

    4 sqrt 3

    1. 👍 0
    2. 👎 0
    posted by Damon
  5. Ahhh confusing!!!

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Algebra

    Two more I would like to check my work on: Solve using the square root property: (x+6)^2 = 4 x+6 = sqrt4 x+6 = -sqrt4 x+6 = 2 x+6 = -2 x+6-6 = 2-6 x+6-6 = -2-6 x = 4 x = -8 Solve by completing the square: x^2+6x+1=0 x^2+6x+1-1 =

    asked by John on November 13, 2007
  2. math

    simplify: 2sqrt50 - sqrt8 I am confused because of the 2 before the sqrt50

    asked by Hannah on July 4, 2010
  3. Math

    use Demoivre's Theorem to find the indicated power of the complex number. Express the result in standard form. (2+2i)^6 a=2 b=2 n=6 r=sqrt 2^2 + 2^2 = sqrt8 Q=7pi/4 (sqrt8)^6 = 512 512(cos 6/1 x 7pi/4) + i sin 6 x 7pi/4 512 (cos

    asked by Abbey(Please help) on May 4, 2010
  4. Math

    use Demoivre's Theorem to find the indicated power of the complex number. Express the result in standard form. (2+2i)^6 a=2 b=2 n=6 r=sqrt 2^2 + 2^2 = sqrt8 Q=7pi/4 (sqrt8)^6 = 512 512(cos 6/1 x 7pi/4) + i sin 6 x 7pi/4 512 (cos

    asked by Abbey(Please help) on May 4, 2010
  5. Calculus

    Hi. In an integration solution, the integral of (1/(sqrt (8-u squared)) is written as arcsin(u/sqrt 8), but I don't see how they got it. When I did it I got (1/8)*(arcsin(u*sqrt8)). What I did was take sqrt8 common in the

    asked by O_o Rion on December 5, 2009
  6. algebra

    how do you simplify (sqrt18)over(sqrt8)-3? And (4-3sqrt2)squared? I tried but get some unreal answer. thanks in advance.

    asked by Robin on March 24, 2015
  7. Algebra 2

    Simplify: sqrt6(sqrt2/2+sqrt3)-sqrt8 I need all of the steps. I need this ASAP because this is due tomorrow. Thanks

    asked by Brandon on May 25, 2011
  8. Algebra 2

    1. Simplify: sqrt6(sqrt2/2+sqrt3)-sqrt8 2. Simplify: sqrt(72x^3)-5x sqrt(2x) 3. Simplify: (2sqrt6-sqrt3)^2 4. Simplify: 6/3+2sqrt3 5. Solve: 2-y=sqrt(y+4) I need all of the steps. Thanks

    asked by Brandon on May 24, 2011
  9. MATH HELP PLEASE

    The slash (/) line represents that the number is a fraction. divide: sqrt45 / sqrt81 = simplify: 7sqrt3 / sqrt5 = Multiply: sqrt7/sqrt8 X sqrt24/sqrt49 = Thanks for the advice regarding how to show square root symbol correctly.

    asked by TO: drwls on October 29, 2011
  10. MATH MIDDLE SCHOOL

    The slash (/) line represents that the number is a fraction. divide: sqrt45 / sqrt81 = simplify: 7sqrt3 / sqrt5 = Multiply: sqrt7/sqrt8 X sqrt24/sqrt49 = Thanks for the advice regarding how to show square root symbol. Also thank

    asked by PLEASE HELP on October 29, 2011

More Similar Questions