## sue101 2 years ago Simplify the sum. 7/(a+8) + 7/(a^2 - 64)

1. ceb105

Okay so notice that the bottom of the second fraction is infact the "difference of two squares" i.e. (a^2-64)=(x-8)(x+8), then multiply the first fraction by x-8 so that you have equal denominators then you may add them together simply and simplify if nessecary

2. ajprincess

What is the lcm of a+8 and a^2-64?

3. sue101

64?

4. lacypennelll

You play AnimalJam?

5. ajprincess

a+8=1*(a+8) a^2-64=(a+8)(a-8)

6. lacypennelll

.-. Thats wha aj stands for

7. sue101

aj??

8. lacypennelll

^ nvm

9. sue101

aj u there?

10. ajprincess

yup I am

11. sue101

oh ok so that answer i will is C or D

12. sue101

??

13. lacypennelll

:| Silence

14. ajprincess

Lcm of a+8 and a^2-64 is a^2-64 a^2-64=(a-8)(a+8) So the common denominator is a^2-64 With vat expression do u need to multiply (a+8) to make it a^2-64?

15. ajprincess

|dw:1359656931020:dw||dw:1359657016517:dw|

16. sue101

I don't have that as a mutilple choice?

17. ajprincess

simplify the numerator