Subject
পেট্রোবাংলা
Topic
গ্যাস ট্রান্সমিশন কোম্পানি লিমিটেড (সহকারী ব্যবস্থাপক) - ১০.০৩.২০১৬
The sum of two numbers is 13, and their product is 30. What is the sum of the squares of the two numbers?
The sum of two numbers is 13, and their product is 30. What is the sum of the squares of the two numbers?
ক)
-229খ)
-109গ)
139ঘ)
109ঙ)
229Explanation
প্রশ্নে বলা হচ্ছে, দুটি সংখ্যার সমষ্টি 13 এবং তাদের গুণফল 30 হলে সংখ্যা দুটির বর্গের সমষ্টি কত? ধরি, একটি সংখ্যা x এবং অপরটি y আমরা জানি, x 2 + y 2 = (x + y) 2 – 2xy ⇒ x 2 + y 2 = (13) 2 – 2 x 30 ⇒ x 2 + y 2 = 169 – 60 ∴ x 2 + y 2 = 109Related questions
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