tolong dijawab ya please bsk dikumpul

9) 4x² + 16x + 15
--------------------------
2x + 5

= ( 2x + 5 )( 2x + 3 )
------------------------------
( 2x + 5 )

= 2x + 3 ( A )


10) 2x - 6y
-----------------
12

= 2 ( x - 3y )
-----------------
12

= x - 3y
------------ ( D )
6

11) ( y / 2 ) + ( x-3 / 3y )

= 3y ( y ) + 2 ( x - 3)
-----------------------------
2 ( 3y )

= 3y² + 2x - 6
---------------------
6y


12) ( 2 / x+2 ) - ( 3 / x+3 )

= 2 ( x + 3 ) - 3 ( x + 2 )
----------------------------------
( x + 2 )( x + 3 )

= 2x + 6 - 3x - 6
------------------------
x² + 5x + 6

= - x
-----------------
x² + 5x + 6


13) ( 3ab / 2c ) : ( 9b² / 4ac )

= ( 3ab ) • ( 4ac )
--------------------------
( 2c ) • ( 9b² )

= 12a²bc
-----------------
18b²c

= 2a²
----------
3b