tturk2014 tturk2014

02-01-2018
Mathematics

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solve x^2+11X<-8 Urgent please help!!!!!

Respuesta :

02-01-2018

Add 121/4 to each side:
x²+11x+121/4 < 121/4-8
x²+11x+121/4 < 89/4
(x+11/2)² < √89/2 ⇒ -√89/2 < x+11/2 < √89/2
-11/2-√89/2 < x < -11/2+√89/2

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