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Is 0.2 a root of the equation x2 – 0.4 = 0? Justify

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Question

Is 0.2 a root of the equation x2 – 0.4 = 0? Justify

Sum
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Solution

No, since 0.2 does not satisfy the quadratic equation

i.e., (0.2)2 – 0.4 = 0.04 – 0.4 ≠ 0

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Chapter 4: Quadatric Euation - Exercise 4.2 [Page 39]

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NCERT Exemplar Mathematics Exemplar [English] Class 10
Chapter 4 Quadatric Euation
Exercise 4.2 | Q 6 | Page 39
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