182755
182755
14-12-2017
Mathematics
contestada
Is 2x + y2=5 a function?
Respuesta :
fangirl2134
fangirl2134
14-12-2017
y=
x2
−4x−5=(
x2
−4x+4)−9=(x−2
)2
−9
y=
x2
−4x−5=(
x2
−4x+4)−9=(x−2
)2
−9
, now as
(x−2
)2
≥0
(x−2
)2
≥0
(so min value is 0) then the minimum value of the function is 0-9=-9.
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