যদি x + y = a, x - y = b হয়, তাহলে 2xy = কত?
Solution
Correct Answer: Option C
দেওয়া আছে
x + y = a
x - y = b
আমরা জানি
4xy = (x + y)2 - (x - y)2
4xy = a2 - b2
4xy/2 = (a2 - b2)/2
2xy = (a2 - b2)/2
x + y = a
x - y = b
আমরা জানি
4xy = (x + y)2 - (x - y)2
4xy = a2 - b2
4xy/2 = (a2 - b2)/2
2xy = (a2 - b2)/2
Practice More Questions on Our App!
Download our app for free and access thousands of MCQ questions with detailed solutions