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Subjects
Class 10MathematicsPolynomialsOperations on real numbers and the laws of exponentsHard
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What is the value of (\frac{\sqrt{45}-\sqrt{20}}{\sqrt{5}})?

Answer and explanation

Correct answer: (1)

(\sqrt{45}=3\sqrt{5}) and (\sqrt{20}=2\sqrt{5}), so the numerator is (\sqrt{5}), and division gives (1). In exams, first make like radicals.

Related tags

RadicalsReal NumbersSimplificationOperations On Real Numbers And The Laws Of ExponentsPolynomialsMathematicsClass 10 Mcq
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  2. 2If α = √3 + 1 and β = √3 − 1, what is αβ?
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