The sum of squares of two numbers ia 80 and the square of difference between two numbers is 36. Find the product of two numbers.
A
17
B
22
C
33
D
28
Correct Answer: 22
মনেকরি, সংখ্যাদ্বয় x ও y প্রশ্নমতে, x2 + y2 + 80.........(i)(x - y)2 = 36 .......(ii)(i)⇒ x2 + y2 + 80⇒(x - y)2 + 2xy = 80⇒ 36 + 2xy = 80 ⇒ 2xy = 44⇒ xy = 22