Respostas

2013-08-15T20:42:28-03:00
4+n*2-4n=n
n*2=n
acho qué isso ...
* = elevado
2013-08-15T20:48:07-03:00
4+n.(n-4)=n
4+n²-4n=n
n²-5n+4=0

Delta= (-5)²-4.1.4
Delta=25-16
Delta=9

x= -(-5) +/- V9 /2.1
x'= 5+3/2 => 4

x''=5-3/2=> 1

4+n.(n-4)=n
4+4.(4-4)=4
4+16-16=4
4=4

4+n.(n-4)=n
4+1.(1-4)=1
4+1-4=1
1=1
1 5 1