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This is adding ad subtracting rational expression (dissimilar)

2 over a+3 - (minus) 4 over a-3

please i really need it right now

1
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2 over a+3 - (minus) 4 over a-3

please i really need it right now

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a + 3 = a + 3

a - 3 = a - 3

Let's construct their LCD.

LCD = (a + 3)(a - 3)

Rewrite each rational expression with the LCD as denominator.

a + 3 a - 3 (a + 3)(a - 3) (a + 3)(a - 3)

We get 2(a - 3) and 4(a + 3) from dividing the LCD to their factored denominators then multiply them to their numerator.

Now do the indicated operation.

(a + 3)(a - 3) 1

=

= -2

That's it. Hope you understand it! :)

-KookEin

Note: It's not copied :)