x+y=8,x-y=6 হলে ,x2+y2 এর মান-
Solution
Correct Answer: Option B
x + y = 8
x - y = 6
⇒ 2(x2 + y2) = (x + y)2 + (x - y)2
⇒ 2(x2 + y2) = 82 + 62
⇒ 2(x2 + y2) = 64 + 36
⇒ 2(x2 + y2)= 100
⇒ x2 + y2 = 50
x - y = 6
⇒ 2(x2 + y2) = (x + y)2 + (x - y)2
⇒ 2(x2 + y2) = 82 + 62
⇒ 2(x2 + y2) = 64 + 36
⇒ 2(x2 + y2)= 100
⇒ x2 + y2 = 50
Practice More Questions on Our App!
Download our app for free and access thousands of MCQ questions with detailed solutions