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Prove by direct method that for any rea...

Prove by direct method that for any real number x,y if x = y then `x^(2) = y^(2)`.

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The correct Answer is:
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Let p:xy, `x,y in R`
On squaring both side,
`" "x^(2) = y^(2) ,q`
`" "p rArr q`
Hence, we have the result.
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NCERT EXEMPLAR-MATHEMATICAL REASONING -OBJECTIVE TYPE QUESTIONS
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  3. Which of the following is not a statement.

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