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?
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).
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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