" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
(4+x)(4-x)≥0
m.z. x=-4 v x=4
____-4_____4_____>x
_ _ 0 + + 0 _ _
D=<-4,4>