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Which option gives the correct real solution of (x^2≤0)?

Answer and explanation

Correct answer: ({0})

For every real number x, the square x^2 is non-negative, so x^2≥0 always. To satisfy x^2≤0 at the same time, the square must be exactly zero. The only real number whose square is zero is x=0. Hence the real solution set is {0}, making option A correct. The empty set in option B is wrong because x=0 works; the set of all real numbers in option C is wrong because, for example, 1^2=1 is not less than or equal to zero. Option D includes many negative values whose squares are positive, so it also fails.

Related tags

Linear-InequalitiesSquare-InequalitySolution-SetIntroduction To InequalitiesLinear InequalitiesMathematicsClass 11 Mcq

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