Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects
0 reads0 ratings0 helpful

For the quadratic equation \(x^2+6x+k=0\) to have equal real roots, what should be the value of \(k\)?

Answer and explanation

Correct answer: 9

A quadratic equation \(ax^2+bx+c=0\) has equal real roots when its discriminant \(D=b^2-4ac\) is zero. Here, \(a=1\), \(b=6\), and \(c=k\), so \(D=6^2-4(1)(k)=0\), giving \(36-4k=0\) and hence \(k=9\). Therefore, 9 is correct. Exam tip: For equal roots, immediately use the condition \(D=0\).

Related tags

Quadratic EquationsNature Of RootsDiscriminantEqual RootsMathematicsClass 10 Mcq

Was this question useful?

No ratings yetWrite a review / Rate this question

Student Reviews

No published reviews yet.

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.