यदि ((a+b,a-b)=(9,1)) है, तो \(a^2-b^2\) का मान क्या है?
If ((a+b,a-b)=(9,1)), what is the value of \(a^2-b^2\)?
Explanation opens after your attempt
B. (9)
Concept
Since (a-2-b-2=(a+b)(a-b)), the value is \(9\cdot1=9\). In exams, match coordinates directly from pair equality.
Why this answer is correct
The correct answer is B. (9). Since (a-2-b-2=(a+b)(a-b)), the value is \(9\cdot1=9\). In exams, match coordinates directly from pair equality.
Exam Tip
क्योंकि (a-2-b-2=(a+b)(a-b)), इसलिए मान \(9\cdot1=9\) है। परीक्षा में युग्म बराबरी से सीधे निर्देशांक मिलाएं।
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