# How do you find the domain of f(x)=x^2-4x+4?

Jan 18, 2017

See explanation.

#### Explanation:

Usually when you have to find the domain of a function you look for any values of $x$ which would be excluded from it.

You look for those values in:

1. Zeros of denominators in the function's formula.

2. Values for which expressions under square root sign would be negative.

3. Values for which expressions under $\log$ sign are negative.

In the given example there are no such values, therfore the domain is all real numbers $D = \mathbb{R}$