Respostas

2014-04-19T19:13:25-03:00
3x-x²=2
-x²+3x-2=0
a=-1 b=3 c=-2
Δ=b²-4ac
Δ=9-4.(-1).(-2)
Δ=1
x= -b +/-√Δ/2a
x= -3 +/-1/-2
x'=2
x''=1
3.2-2²=2
6-4=2
2=2
e
3.1-1²=2
3-1=2
2=2

2 5 2