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At which points on the number line will the solutions of the equation \(x^2-25=0\) be located?

Answer and explanation

Correct answer: −5 and 5

From \(x^2-25=0\), we get \(x^2=25\). Therefore, \(x=5\) or \(x=-5\), so the solutions lie at −5 and 5 on the number line. Option B incorrectly includes 25; 25 is not a value of \(x\) satisfying the equation. Exam tip: When taking the square root of a positive number, consider both the positive and negative values.

Related tags

PolynomialsNumber LineQuadratic EquationsReal NumbersRepresenting Real Numbers On The Number LineMathematicsClass 10 Mcq

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