कौन-सा विकल्प \(\sqrt{45}\) और \(2\sqrt{5}\) के अंतर को सही बताता है?
Which option correctly gives the difference between \(\sqrt{45}\) and \(2\sqrt{5}\)?
Explanation opens after your attempt
A. \(\sqrt{5}\)
Concept
\(\sqrt{45}=3\sqrt{5}\).
Why this answer is correct
The difference is \(3\sqrt{5}-2\sqrt{5}=\sqrt{5}\), which is irrational.
Exam Tip
For like surds, subtract only the coefficients. चरण 1: \(\sqrt{45}=3\sqrt{5}\) है। चरण 2: अंतर \(3\sqrt{5}-2\sqrt{5}=\sqrt{5}\), जो अपरिमेय है। चरण 3: समान मूल वाले पदों में केवल गुणांक घटाएँ।
Login to save your score, XP, coins and progress.