tolong jawab kak jangan ngasal serta pakai cara;)

1) ( 3c / 2) × ( 2c / 5 )
= (3c) × (2c)
-------------------
( 2 ) × ( 5 )
= 6c²
-------
10
= (2)(3c²)
--------------
( 2 ) ( 5 )
= 3c²
---------
5

2) ( p / 5 ) × ( p / 3 )
= (p) × (p)
---------------
( 5 ) ( 3 )
= p²
------
15

3) ( 2a / 3) × (2a / 3 )
= (2a ) × ( 2a)
--------------------
( 3 ) × ( 3 )
= 4a²
---------
9

4) ( 7mn / 5k ) × ( 3kn² / 4m²)
= ( 7mn ) × ( 3kn²)
--------------------------
( 5k ) × ( 4m²)
= 21 kmn³
---------------
20 km²
= ( km ) ( 21n³)
----------------------
( km ) ( 20m)
= 21 n³
--------
20 m

5) ( ab / 8c² ) × ( 12a / 7b²c )
= ( ab ) × ( 12a )
-----------------------
( 8c² ) × ( 7b²c )
= 12a²b
------------
56b²c³
= (4b)(3a²)
----------------
(4b) ( 14bc³)
= 3a²
--------
14bc³