Question

four less than the square of a number is 0​

Answer 1

Answer:

± 2

Step-by-step explanation:

let the number be n , then

n² - 4 = 0 ( add 4 to both sides )

n² = 4 ( take square root of both sides )

n = ± $\sqrt{4}$ = ± 2

The number is - 2 or 2

Answer 2

Answer:

If ∈ℝ, prove that 0<<1 ⟹ 0<2< and >1⟹2>.

I found some solution for rational 's but I'm stuck with real 's.