If a = 5​and b = 5 - 5​, which of the following is true? ​

Explanation

Given: a = 5​ ​ b=5- 5​ ​ Solution: Calculate a + b: a + b = 5 + (5 − ​ 5)​= 5. ​ Since 5 is a rational number, a + b is rational. Check other options: a-b= 5 − (5 − 5) = 2 5 − 5​(Irrational). ​ ​ ​ ab = 5(5 − 5) = 5 5 − 5​(Irrational). ​ ​ ​ Final Answer So the correct answer is (d)