\(r^2+13r+36\) के सही गुणनखंड कौन से हैं?
What are the correct factors of \(r^2+13r+36\)?
Explanation opens after your attempt
B. ((r+4)(r+9))
Concept
(4+9=13) and \(4\times9=36\). Exam tip: choose the correct pair from factors of the last term.
Why this answer is correct
The correct answer is B. ((r+4)(r+9)). (4+9=13) and \(4\times9=36\). Exam tip: choose the correct pair from factors of the last term.
Exam Tip
(4+9=13) और \(4\times9=36\) है। परीक्षा में अंतिम पद के कारकों से सही जोड़ी चुनें।
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