What is the critical sqrt(x^2-4) ?

The critical sqrt(x^2-4) is x=-2,x=2

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critical sqrt(x^2-4)

critical points

x^{2} - 4

x = - 2, x = 2

Solution steps

x^{2} - 4

Find where

f^{'} (x)

is equal to zero or undefined

x = - 2, x = 2

Identify critical points not in

f (x)

domain

Domain of

x^{2} - 4 : x \leq - 2 or x \geq 2

All critical points are in domain

x = - 2, x = 2