Dummie13 Dummie13
  • 25-09-2016
  • Mathematics
contestada

Please solve rational inequality and express in an interval notation
x-8/x+7>0

Respuesta :

sarahinkpen sarahinkpen
  • 25-09-2016
X^2+7x-8>0 eliminating denominator Factoring (x+8)(x-1) must be positive so Case 1 both positive is x>-8 and x>1. For both to occur x>1 Case 2 both are negative (x+8)<0 and (x-1)<0 so x<-8 and x<1. For both to occur x<-8 Therefore x<-8 or x>1
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