Respostas

2014-04-29T11:03:50-03:00
Usando bhaskara
(-b+-sqrt(b²-4ac))/2a => (-5+-sqrt(5²-4*4*0))/4*2 =>
bhaskara sempre gera duas raizes sendo :
(-5+sqrt(5²-4*4*0))/4*2  => (-5+sqrt(25))/4*2 => (-5+5)/8 => 0/8 => 0
(-5+sqrt(5²-4*4*0))/4*2  => (-5+sqrt(25))/4*2 => (-5-5)/8 => -10/8 => -5/4

Obs.: sqrt= raiz
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