Respostas

2013-09-25T13:11:28-03:00
Y=x²-6x+9

A=  1
B=  -6
C=  9

Δ= b²-4ac
Δ= (-6)²-4.1.9
Δ= 36-36
Δ= 0

x= -b+-Δ/2a
x=-(-6)+-0/2.1

x=6/2 =  3
x=-6/2= -3
1 5 1