Jawabanmu

2014-08-26T14:11:20+07:00
5x²+2x+x²-2x
= 5x²+x²+2x-2x
=6x²
2014-08-26T14:15:22+07:00
5x²+2x+x²-2x
= 5x²+x²+2x-2x
=6x²