Respuesta :

ExcludedPenguin

Answer:

true

Step-by-step explanation:

it equals to

x1= -1

and

x2= 1

Answer:

Step-by-step explanation:

y=x²-1 is not a function for every value of y , x has more than one value

ex: if x=-1 , y=(-1)²-1 then y=0

if x=1 then y=0

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