Jawabanmu

2014-09-08T17:00:57+07:00
15x(x-4y)-6(x-4y)=15x²-60xy-6x+24y=15x²-6x+24y-60xy
2014-09-08T17:33:35+07:00
(15x-6)(x-4y)
=15xpangkat 2 -60xy-6x-24y