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^2=16), what is the value of (x) by square root method?

Answer and explanation

Correct answer: (x=\pm4)

The direct answer is option A: x=±4. The square root method starts with x²=16. Taking square roots gives x=±√16=±4, because both 4² and (-4)² equal 16. The plus-or-minus sign is essential whenever a positive number is the square of an unknown real number. Option A is correct because it includes both solutions. Option B, x=4, is only one solution and wrongly excludes -4. Option C, x=-4, is also only one solution and excludes 4. Option D, x=±8, is wrong because 8²=64, not 16. To check, substitute: 4²=16 and (-4)²=16. A common mistake is to write only the positive square root; remember that squaring removes the sign, so both signs must be restored.

Related tags

QuadraticSquare-Root-MethodRoots

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.