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Which number does \(-\sqrt{1.69}\) represent on the number line?

Answer and explanation

Correct answer: \(-1.3\)

Since \(1.3^2=1.69\), we have \(\sqrt{1.69}=1.3\). The negative sign outside the radical makes the result negative, so \(-\sqrt{1.69}=-1.3\). Option B ignores the negative sign, while option D gives the radicand itself instead of its square root. Exam tip: find the square root first and then apply any sign outside the radical.

Related tags

Number LineNegative Square RootDecimal Square RootRepresenting Real Numbers On The Number LinePolynomialsMathematicsClass 10 Mcq

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