यदि (u+v=11) और (uv=28), तो \(u^2+v^2\) का मान क्या होगा?
If (u+v=11) and (uv=28), what is the value of \(u^2+v^2\)?
Explanation opens after your attempt
A. (65)सही मान
Concept
(u-2+v-2=(u+v)2-2uv=121-56=65). In exams subtract (2uv) from the square of the sum.
Why this answer is correct
The correct answer is A. (65) / सही मान. (u-2+v-2=(u+v)2-2uv=121-56=65). In exams subtract (2uv) from the square of the sum.
Exam Tip
(u-2+v-2=(u+v)2-2uv=121-56=65) है। परीक्षा में योग के वर्ग से (2uv) घटाएं।
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