\(\sqrt{45}+\sqrt{80}-\sqrt{20}\) का सरल रूप क्या है?
What is the simplified form of \(\sqrt{45}+\sqrt{80}-\sqrt{20}\)?
Explanation opens after your attempt
Correct Answer
A. \(5\sqrt{5}\)
Concept
\(\sqrt{45}=3\sqrt{5}\), \(\sqrt{80}=4\sqrt{5}\), and \(\sqrt{20}=2\sqrt{5}\).
Why this answer is correct
\(3\sqrt{5}+4\sqrt{5}-2\sqrt{5}=5\sqrt{5}\).
Exam Tip
Convert all radicals to like form before adding or subtracting. चरण 1: \(\sqrt{45}=3\sqrt{5}\), \(\sqrt{80}=4\sqrt{5}\), और \(\sqrt{20}=2\sqrt{5}\)। चरण 2: \(3\sqrt{5}+4\sqrt{5}-2\sqrt{5}=5\sqrt{5}\)। चरण 3: जोड़ और घटाव से पहले सभी वर्गमूलों को समान रूप में बदलें।
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