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

If (x=3), what is the value of (2(x+4)-x^2)?

Answer and explanation

Correct answer: 5

Given \(x=3\), \(2(x+4)-x^2=2(3+4)-3^2=2\times7-9=14-9=5\). Therefore, the correct answer is 5. The value 7 can result from incorrectly evaluating \(x^2\) or missing the multiplication by 2. Exam tip: after substitution, evaluate powers first, then multiplication, and finally addition or subtraction.

Related tags

Algebraic ExpressionsSubstitutionOrder Of OperationsPolynomialsClass 9 MathematicsIntroduction To PolynomialsMathematicsClass 9 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.