\(2+\sqrt{13}\) और \(2-\sqrt{13}\) का गुणनफल क्या है?
What is the product of \(2+\sqrt{13}\) and \(2-\sqrt{13}\)?
Explanation opens after your attempt
B. ( -9 )
Concept
Conjugate multiplication gives (22-\(\sqrt{13}\)2=4-13=-9). Use the difference of squares rule here.
Why this answer is correct
The correct answer is B. ( -9 ). Conjugate multiplication gives (22-\(\sqrt{13}\)2=4-13=-9). Use the difference of squares rule here.
Exam Tip
संयुग्मी गुणन से (22-\(\sqrt{13}\)2=4-13=-9) मिलता है। इस रूप में अंतर के वर्ग का नियम लगाएँ।
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