Respuesta :

7/a^2 + 7/a - 56

You would just add 8 to 64. You can't simplify 7/a^2 and 7/a because of the exponent. Hope this helps.
calculista

Answer:

[tex]\frac{7(a-7)}{(a+8)(a-8)}[/tex]

Step-by-step explanation:

we have

[tex]\frac{7}{a+8}+\frac{7}{a^{2}-64}[/tex]

Remember that

[tex]a^{2}-64=(a+8)(a-8)[/tex]

substitute

[tex]\frac{7}{a+8}+\frac{7}{(a+8)(a-8)}=\frac{7(a-8)+7}{(a+8)(a-8)}\\ \\=\frac{7a-56+7}{(a+8)(a-8)}\\ \\= \frac{7a-49}{(a+8)(a-8)}\\ \\=\frac{7(a-7)}{(a+8)(a-8)}[/tex]

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