यदि \(5x^2+kx+45=0\) में मूलों का गुणनफल मूलों के योग का (-3) गुना है, तो (k) क्या होगा?
If in \(5x^2+kx+45=0\), the product of roots is (-3) times the sum of roots, what is (k)?
Explanation opens after your attempt
A. (15)
Concept
The product is (9) and the sum is \(-\frac{k}{5}\). From (9=-3\left\(-\frac{k}{5}\right\)), we get (k=15).
Why this answer is correct
The correct answer is A. (15). The product is (9) and the sum is \(-\frac{k}{5}\). From (9=-3\left\(-\frac{k}{5}\right\)), we get (k=15).
Exam Tip
गुणनफल (9) और योग \(-\frac{k}{5}\) है। (9=-3\left\(-\frac{k}{5}\right\)) से (k=15) मिलता है।
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