Question

How do you solve the inequality `x^2+4<=4x` and write your answer in interval notation?

Answer 1

There is only one solution `S={2}`

Explanation:

Let's rewrite and factorise the inequality

`x^2+4<=4x`

`x^2-4x+4<=0`

`(x-2)^2<=0`

There is only one solution,

`x=2`