Jawabanmu

2014-09-01T19:16:50+07:00
1. 4x²+x-x²+2
4x²-x²+x+2
5x²+x+2

2. 2ab-3bc+5ab-4bc
2ab+5ab-3bc-4bc
7ab-7bc

c. -4x²-6x+8