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At which points does the graph y=x^2-8x+12 cut the x-axis?

Answer and explanation

Correct answer: (2,0) and (6,0)

An x-axis intercept is a point whose y-coordinate is zero. Set the quadratic equal to zero: x^2−8x+12=0. Factorisation gives (x−2)(x−6)=0. By the zero-product property, x−2=0 or x−6=0, so x=2 or x=6. The corresponding points on the x-axis are (2,0) and (6,0). Thus option A is correct. Option B changes the signs of both roots and does not satisfy the equation. Option C lists points with x=0, which concerns the y-axis rather than the x-axis. Option D gives 3 and 4, but substituting either value does not make the quadratic zero. The factorisation also provides a direct verification of both intercepts.

Related tags

Quadratic-GraphsX-InterceptsFactorisationGraphs Of Standard FunctionsRelations And FunctionsMathematicsClass 11 Mcq

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