Respostas

2013-10-16T19:39:00-03:00
(x+1).(x+10)
x²+10x+x+10
x²+11x+10 
2013-10-16T19:39:22-03:00
X² + 10x = x + 10
x² + 10x - x = 10
x² + 9x = 10
x² + 9x - 10 = 0