Respostas

2013-06-10T20:46:00-03:00

questao A

 

delta=b²-4a.c

delta=9²-4.1.(-10)

delta=81+40

delta=121

 

x=(-B+/-raiz de 121)/2.a

x=(-3+/-11)/2

x1=(-3-11)/2

x1=-14/2

x1=-7

 

x2=(-3+11)/2

x2=8/2

x2=4

 

questao B

 

delta=5²-4.1.4

delta=25-16

delta=9

 

x=(-b+/- raiz de 9)/2.a

x=(-5+/-3)/2

x1=(-5-3)/2

x1=-8/2

x1=-4

 

x2=(-5+3)/2

x2=-2/2

x2=-1

 

 

espero ter ajudado

 

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