Convert the inequality to an equation.

Factor using the perfect square rule.

Rewrite as .

Check the middle term by multiplying and compare this result with the middle term in the original expression.

Simplify.

Factor using the perfect square trinomial rule , where and .

Set the equal to .

Add to both sides of the equation.

Use the inequality to build the set notation.

Convert to Set Notation x^2-4x+4<=0