The sum of two numbers is 22 and the sum of their squares is 404.The product of two numbers is -

A 40

B 44

C 80

D 88

Solution

Correct Answer: Option A

ধরি ,সংখ্যাদ্বয় x ও y
প্রশ্নমতে ,x+y=22........i
এবং x²+y²=404.......ii
(ii) থেকে পাই,
     (x+y)² -2xy=404
বা, (22)²-2xy=404
বা, 484=2xy =404
-2xy=-80
xy=40
অতএব, সংখ্যাদ্বয়ের গুণফল =40

Practice More Questions on Our App!

Download our app for free and access thousands of MCQ questions with detailed solutions