Respostas

2013-09-29T14:41:57-03:00
x2+3x-2x-6= x2+x-6
a2-7a-2a+14= a2-9a+14
y2-6y+6y-36= y2-36
6x2-4x-15x+10= 6x2-19x+10
4+3x-8x-6x2= 6x2-5x+4