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At which point does the graph y=x^3+27 cut the x-axis?

Answer and explanation

Correct answer: (-3,0)

To find where a graph cuts the x-axis, use the defining condition y=0. Substituting into y=x^3+27 gives x^3+27=0, so x^3=−27. The real cube root is x=−3, and therefore the x-axis intercept is (−3,0), making option A correct. Substitution confirms the result because (−3)^3+27=−27+27=0. Option B results from dropping the negative sign while taking the cube root. Option C is the y-intercept, since x=0 gives y=27 rather than zero. Option D incorrectly uses the constant 27 as the x-coordinate; substituting x=27 gives a positive value, not an x-axis point. The negative sign is essential in this calculation.

Related tags

Cubic-GraphsX-InterceptCoordinate-GeometryStandard-FunctionsGraphs Of Standard FunctionsRelations And FunctionsMathematicsClass 11 Mcq

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