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8a) 1 (2x+6) + 4 (x+3) 2x+6 + 4 x +12
------------------------------ = ---------------------------------
(x+3) (2x+6) (x+3) (2x+6)
= 6x +18
---------------------------------
(x+3) (2x+6)
= 3 ( 2x +6)
-------------------------
(x+3)(2x+6)
= 3
-------------------------
(x+3)
8b) 5 (x^2 -9) + 5 (x+3) = 5x^2 - 45 + 5x + 15
------------------------------ ---------------------------------
(x+3) (x^2-9) (x+3) (x^2-9)
= 5x^2 +5x -30
-----------------------------
(x+3) (x^2-9)
= (5x-10) (x+3)
-------------------------
(x+3 )( x^2-9)
= (5x-10)
-----------
(x^2-9)
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