Question

se a=5+√3 e b=5-√3
2 2 o valor de a-b é?

Answer 1

$a=5+\sqrt{3},\;\;\;b=5-\sqrt{3}\\ \\ \\ a-b\\ \\ =\left(5+\sqrt{3} \right )-\left(5-\sqrt{3} \right )\\ \\ =5+\sqrt{3}-5+\sqrt{3}\\ \\ =5-5+\sqrt{3}+\sqrt{3}\\ \\ =2\sqrt{3}\\ \\ \\ \boxed{a-b=2\sqrt{3}}$