mathcalculus
posted by Shreya on .
30/x^225 = 3/x52/x+5
i be left with
30 = 3x^2752x^2+50
i not sure what to do? i use the quadratic formula?

First, you have to simplify properly:
30/(x^225) = 3/(x5)  2/(x+5)
30 = 3(x+5)  2(x5)
You were ok multiplying through by x^2  25 but you then discarded the denominators on the right, which was incorrect.
3(x^225)/(x5) = 3(x+5)
Anyway, now we are just left with
30 = 3(x+5)  2(x5)
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/(x5) is not defined when x=5. 
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.