Determine if Injective (One to One) f(x)=x^2-4

$f (x) = x^{2} - 4$

Step 1

Write $f (x) = x^{2} - 4$ as an equation.

$y = x^{2} - 4$

Step 2

A function is said to be injective or one-to-one if every y-value has only one corresponding x-value.

Not injective (Not One-to-One)

Step 3