Question

I need some help on this question

Answer 1

Answer:

3/a-5

Step-by-step explanation:

first of all you have to open the equatıon:

a2+8a+15= (a+3).(a+5)

a2+7a+12= (a+3).(a+4)

3a+12=3(a+4)

a2-25=(a-5).(a+5)

now ın this equation you can delete the same brackets:

(a+3).(a+5)÷(a+3).(a+4)= (a+5)÷(a+4)

3(a+4)÷(a-5)(a+5).(a+5)÷(a+4)= 3(÷a-5)