a-b = 2 এবং ab = 24 হলে a2-b2=?
এখানে, a - b =2, ab = 24
(a+b)2 = (a - b)2 + 4ab
= 4 + 96
(a + b) = 10
a2 - b2 = (a + b) (a - b)
= 10 × 2
= 20