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Which is the best simplified form for √50 on the number line?

Answer and explanation

Correct answer: 5√2

The governing concept is simplifying a square root by extracting perfect-square factors. Factor 50 as 25 × 2, where 25 is a perfect square. Using √(ab) = √a × √b, we get √50 = √(25 × 2) = √25 × √2 = 5√2. Therefore option A is correct. A numerical check gives √50 approximately 7.07, and 5√2 has the same approximate value. Although 2√5 is also approximately 4.47 and is not equal to √50, the other choices are much larger: 10√5 and 25√2 do not preserve the original value. The simplified radical should have no square factor remaining inside the root, which is why 5√2 is the preferred form.

Related tags

Square-RootsSurd-SimplificationNumber-LineRepresenting Real Numbers On The Number LinePolynomialsMathematicsClass 10 Mcq

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