Answer:
Second choice
Explanation:
Multiply numerator by numerator and denominator by denominator
(2a+10)a
a^2(a^2+2a-15)
Cancel a from a^2
(2a+10)
a(a^2+2a-15)
Factor: 5-3=2 and 5(-3)=-15. a^2+5a-3a-15=0. Group: a(a+5)-3(a+5)=(a-3)(a+5)
Factor: 2*a+2*5=2(a+5)
Cancel out (a+5)
2/(a(a-3))