Math Tips & Tricks (Playlist): • Math Tips & Tricks
Root 4 is 2 or ±2 😲 Math Tips & Tricks
Root 4 is 2 or ±2 explanation with examples by Prabhat ranjan for class 12, boards, IIT JEE 2025, JEE Main 2025, JEE Advanced 2025, IIT JEE 2026, JEE Main 2026, JEE Advanced 2026.
"Root 4 is 2 or ±2? Math Tips & Tricks" by Prabhat Ranjan provides a clear and insightful explanation regarding the value of the square root of 4, a concept crucial for Class 12 Mathematics and competitive exams like IIT JEE 2025, JEE Main 2025, JEE Advanced 2025, and similar exams in 2026. The square root of a number, by definition, is a value that, when multiplied by itself, gives the original number. Therefore, the principal square root of 4 is 2, because 2 × 2 = 4. However, when solving equations such as x² = 4, both 2 and -2 are solutions, because (-2) × (-2) also equals 4. Hence, while the square root symbol (√) typically denotes the principal (positive) root, which is 2 in this case, the solutions to the equation x² = 4 are ±2. Prabhat Ranjan emphasizes understanding this distinction with practical examples and exercises, ensuring students grasp why √4 is 2 but solving x² = 4 yields both 2 and -2. This nuanced explanation is essential for board exams and competitive exams, providing students with a solid foundation in dealing with square roots and their applications in various mathematical contexts.
All these aspects have been covered by Prabhat Ranjan in full detail in his new KZread video.
I am Prabhat Ranjan, currently pursuing B.Tech in Mechanical Engineering from NIT Jamshedpur.
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