math-calculus

posted by .

30/x^2-25 = 3/x-5-2/x+5

i be left with

30 = 3x^2-75-2x^2+50

i not sure what to do? i use the quadratic formula?



math-calculus - Steve, Saturday, January 7, 2012 at 3:38pm
First, you have to simplify properly:

30/(x^2-25) = 3/(x-5) - 2/(x+5)
30 = 3(x+5) - 2(x-5)

You were ok multiplying through by x^2 - 25 but you then discarded the denominators on the right, which was incorrect.

3(x^2-25)/(x-5) = 3(x+5)

Anyway, now we are just left with

30 = 3(x+5) - 2(x-5)

which I'm sure you can solve. Just make sure your answer is not 5 or -5, because the original equation is undefined there. The fraction 3/(x-5) is not defined when x=5.



math-calculus - Shreya, Saturday, January 7, 2012 at 5:37pm
thanks Steve but i think im still messing up. i got 30 = x+30
and if i subtract 30 from each side then i only left with x that be no solution. i think i not doing something right.

  • math-calculus -

    30 = 3(x+5) - 2(x-5)
    30 = 3 x + 15 - 2x + 10
    15 = x + 10
    5 = x
    THERE IS NO SOLUTION
    because 3/(5-5) is division by zero

  • math-calculus -

    thank you so much damon :)

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math,algebra

    can someone help me out factor out this 0=16t^2-122t+180 i have so far this but the last one i am not sure 8(2t^2-14t + ?
  2. Math

    Use the quadratic formula to solve each of the following quadratic equations... 1. 2x^2-5x=3 2. 3x^2-2x+1=0 Rearrange the equation in quadratic formula form. 2x^2 -5x -3 = 0 Then use the formula. Tell me what you don't understand about …
  3. physics - last question

    Sam is sitting in her fishing boat watching a trout swim below the surface. She guesses the apparent depth of the trout at 2.0m. She estimates that her eyes are about 1.0 m above the water's surface, and that the angle at which she's …
  4. algebra 2

    Posted by hellogoodbie on Saturday, January 16, 2010 at 3:24pm. Posted by hellogoodbie on Saturday, January 16, 2010 at 2:59pm. How is this problem done?
  5. College Algebra

    Solve the following equation in the complex number system x^4+x^3+4x^2+10x-60=0 College Algebra - Reiny, Monday, January 2, 2012 at 11:49pm hint x = 2 and x = -3 are roots so either do long division by x-2 and x+3 to get a quadratic …
  6. math-calculus

    30/x^2-25 = 3/x-5-2/x+5 i be left with 30 = 3x^2-75-2x^2+50 i not sure what to do?
  7. math-calculus

    solve equation |x^2-2x-6| using quadratic formula. i not get how to do this and it says quadratic formula.
  8. Chemistry(Please help)

    What is the pH of a 5.06E-2 M aqueous solution of sodium acetate?
  9. Math

    This is the same equation as before just with different numbers. y=yo + (vo sin Q) t - 1/2gt^2 This time the numbers are: 0 = 1.005 + (3.021 sin 30)t - 1/2(9.8)t^2 4.9t^2 - 1.5105 - 1.005 = 0 This is the part where I am stuck. Did …
  10. Math(Please answer)

    This is the same equation as before just with different numbers. y=yo + (vo sin Q) t - 1/2gt^2 This time the numbers are: 0 = 1.005 + (3.021 sin 30)t - 1/2(9.8)t^2 4.9t^2 - 1.5105 - 1.005 = 0 This is the part where I am stuck. Did …

More Similar Questions