a + b = 6 এবং ab = 8 হলে (a - b)2 = কত?

a + b = 6 এবং ab = 8 হলে (a - b)² = কত?

A 8

B 6

C 4

D 2

Solution

Correct Answer: Option C

(a-b)²-=(a+b) ² -4ab=6²-4.8 =36-32

∴ (a-b)² =4