Respostas

2013-05-28T15:36:15-03:00

a= -1

b= 10

c= -21

 

delta = 10² - 4 . -1. -21 = 100 - 84 = 16

 

x1 = (- 10 + raiz de 16 )/ -2 = (-10 + 4)/-2= -6/-2= 3

x2 = ( -10 - raiz quadrada de 16)/-2 =  -14/-2 = 7

 

 

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  • Usuário do Brainly
2013-05-28T15:40:39-03:00