tentukan hasil no 3 dan 4 ,please bantui pake cara

3a) 2x² + 7x - 15
-------------------------
x + 5

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

= 2x - 3

b) 6x² - 7x - 24
------------------------
3x - 8

= ( 3x - 8)( 2x + 3)
--------------------------
( 3x - 8 )

= 2x + 3

c) - 3x² - 5x + 2
------------------------
x + 2

= ( - 3x + 1) ( x + 2)
---------------------------
( x + 2)

= - 3x + 1

4a) 4x² + 6x
--------------------
2x

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

= 2x + 3

b) 16x^5y⁴z³
--------------------
4x³y²z

= ( 4x³y²z )( 4x²y²z²)
-------------------------------
( 4x³y²z )

= 4x²y²z²