Which is equivalent to 3x/x+5 - x-5/x a: x^2+25/x(x+5) b: 2x^2+25/x(x+5) c: 2(x+5)/x(x+5) d: 2(x-5)/x(x+5)

LCM of x+5 and x is x(x+5)

multiplying each term by x(x+5) gives us the numerator:-

=  3x^2 - (x-5)(x+5)

= 3x^2 - (x^2 - 25)  
= 2x^2 + 25  

so answer is 

2x^2 + 25 / x(x+5)

Its B