Question

if a+b=11 and ab=30 then find the value of (a-b)​

Answer 1

Answer:

The required value of a-b is ±1

Step-by-step explanation:

(a-b)^2 = (a + b)^2 - 4ab

⇒ (a-b)^2 = 11^2 - 4× 30

⇒ (a-b)^2 = 121 - 120

⇒ (a-b)^2 = 1

⇒ a-b = ±1