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If (a^2=729) then what is the positive value of (a)?

Answer and explanation

Correct answer: 27

Since 27 × 27 = 729, the positive value of a satisfying a² = 729 is 27. The negative value −27 also gives 729 when squared, but the question specifically asks for the positive value. Exam tip: the positive square root of 729 is √729 = 27.

Related tags

ExponentsSquare RootsNumber SystemsPerfect SquaresQuadratic EquationsMathematicsClass 9 Mcq

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