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The graph of a polynomial crosses the x-axis at two distinct points and does not merely touch it at any point. What does this imply?

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Answer and explanation

Correct answer: There are two distinct real zeroes

If the graph crosses the x-axis at two distinct points, each crossing corresponds to a different real root of the polynomial. Crossing typically indicates an odd multiplicity (often 1) at that root. Choice B is incorrect because a repeated root refers to the same x-value occurring multiple times (leading to touching or flattened behavior at one point), not two separate intersection points. C and D are clearly wrong: no real roots would give no intersections, and every point being a root would mean the polynomial is identically zero. Exam tip: count distinct intersection x-values for number of distinct real roots; check whether the graph crosses (odd multiplicity) or merely touches (even multiplicity).

Related tags

PolynomialsZeros-Of-PolynomialGraphingRootsMultiplicity

Frequently asked questions

What is the correct answer to this question?

There are two distinct real zeroes

Why is this the correct answer?

If the graph crosses the x-axis at two distinct points, each crossing corresponds to a different real root of the polynomial. Crossing typically indicates an odd multiplicity (often 1) at that root. Choice B is incorrect because a repeated root refers to the same x-value occurring multiple times (leading to touching or flattened behavior at one point), not two separate intersection points. C and D are clearly wrong: no real roots would give no intersections, and every point being a root would mean the polynomial is identically zero. Exam tip: count distinct intersection x-values for number of distinct real roots; check whether the graph crosses (odd multiplicity) or merely touches (even multiplicity).

Which subject and chapter does this question cover?

This is a Class 10 Mathematics question. Chapter: Polynomials. Topic: Geometrical meaning of the zeroes of a polynomial..

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