Jawapan

2016-03-14T20:41:57+08:00
(2x²+6x-8)(x+3)

2x²*x=2x³
2x²*3=6x²
6x*x=6x²
6x*3=18x
-8*x=-8x
-8*3=-24

6x²+6x²=12x²
18x-8x=10x

2x³+12x²+10x-24