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Can you help me solve for a?

Can you help me solve for a?-example-1

1 Answer

5 votes

Answer:

option D

Explanation:


(3)/(x+9) + (5)/(x-9)

=
(3(x-9) + 5(x+9))/((x+9)(x-9))

=
(3x - 27 + 5x + 45)/((x^2 - 9^2))

=
(8x + 18)/((x^2 - 81))

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