यदि (x+y=9) और (x-y=1), तो \(x^2-y^2\) का मान क्या होगा?
If (x+y=9) and (x-y=1), what is the value of \(x^2-y^2\)?
Explanation opens after your attempt
B. (9)
Concept
(x-2-y-2=(x-y)(x+y)). Therefore, the value is \(1\cdot9=9\).
Why this answer is correct
The correct answer is B. (9). (x-2-y-2=(x-y)(x+y)). Therefore, the value is \(1\cdot9=9\).
Exam Tip
(x-2-y-2=(x-y)(x+y)) होता है। इसलिए मान \(1\cdot9=9\) है।
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