यदि \(x^2-2x=15\), तो \(2x^2-4x+7\) का मान क्या होगा?
If \(x^2-2x=15\), what is the value of \(2x^2-4x+7\)?
Explanation opens after your attempt
C. (37)
Concept
(2x-2-4x+7=2\(x^2-2x\)+7). Using the given value, (2(15)+7=37).
Why this answer is correct
The correct answer is C. (37). (2x-2-4x+7=2\(x^2-2x\)+7). Using the given value, (2(15)+7=37).
Exam Tip
(2x-2-4x+7=2\(x^2-2x\)+7) है। दिए मान से (2(15)+7=37)।
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