posted by .

How to factor (x/x-2)-(x+2/x)
my answer is -x^2-x-2/x

and (3+sq rt 5)*(3-sq rt 5)
my answers are either 4 or 3*sq rt 5^2

are any of these right?

Thanks so much for all of your help.

  • math -

    I have a feeling your question is

    x/(x-2) - (x+2)/x

    Factoring doesn't make much sense, more than likely it says "simplify", am I right?

    for (3 + √5)(3 - √5)

    You should recognize the 'difference of squares' patter, or you could just expand it

    = 9 - 5 = 4

    4 is the only answer

  • math -

    Yes, you are right. It does say simplify.

  • math -

    back to x/(x-2) - (x+2)/x then

    common denominator is x(x-2)

    so x/(x-2) - (x+2)/x
    = [x^2 - (x+2)(x-2)] / [x(x-2)]
    = (x^2 - x^2 + 4)/[x(x-2)]
    = 4/(x(x-2))

  • math -

    I changed my answer to
    x/(x-2) - (x+2)/x to 4/x(x-2)

    Is that right?

  • math -

    got it, thanks!

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. MATH/ Check?

    Correct. what is pi The definition or the number?
  2. maths

    how do i solve this equation? there is another answer other than 0, but i am not sure how to get it. 5x^2 + 7x =0 factor the term: x(5x+7)=0 Either term can be zero. You found the x=0, what value of x makes 5x+7 zero?
  3. Chemistry

    I Have Two Questions 1)How would you calculate the number of nanometers in 8.1 cm?
  4. math,correction

    Can someone correct these for me plz... Problem#6 Factor. x(x-5)-2(x-5) My answer is: (x-2)(x-5) Problem#7 Factor completely. x^2-x-6 My answer is: (x+2)(x-3) Problem#8 Factor completely. 35x^2+40x+5 My answer is: (7x+1)(5x+5) Problem …
  5. Math

    One solution of 12x^3-23x^2-3x+2=0 is 2. Find all other solutions. I tried rearranging the equation to factor by grouping, but that 23x^2 is bothersome and I can't get the right answers (I know the answers are 2, 1/4, and -1/3). Help?
  6. math

    If the sides of a box all double in length, by how much does its volume increase?
  7. Statistics

    A quiz consists of 10 multiple choice questions. Each question is marked either “right” or “wrong.” Each right answer gets 5 points, and 1 point is taken off for each wrong answer. The correlation between the number of right …
  8. stats

    two factor ANOVA indep measures exper. 2 level factor A 3 level factor B n=5 in each treatment SS df ms between 240 5 factor A ?
  9. Math

    if f(x) = 2x^2+4 and g(x)=x-3 which number satisfies f(x)= (f o g)(x) A) 3/2 B) 3/4 C) 5 D) 4 I am positive that answer A is correct, i just cant get the work to prove it, i can disprove all other answers and my teacher has assured …
  10. MATH

    A quiz consists of 90 multiple-choice questions, each with 4 possible answers (A, B, C and D). For someone who makes random guesses for all of the answers, find the probability of getting A as right answer. A is the correct answer …

More Similar Questions