If a graph crosses the x-axis at 2.5, what is the zero (root) of the polynomial?
Answer and explanation
Correct answer: 2.5
The root (zero) of a polynomial is the x‑value where its graph meets the x‑axis. Hence the zero is the number 2.5. Option B (2.5, 0) denotes the coordinate point on the plane — a point, not the numeric root. Option C is incorrect because x=0 is not where the graph crosses; Option D is the point on the y‑axis and irrelevant. Exam tip: when asked for a root or zero give the x‑value (a single number), not the ordered pair of the point.
Frequently asked questions
What is the correct answer to this question?
2.5
Why is this the correct answer?
The root (zero) of a polynomial is the x‑value where its graph meets the x‑axis. Hence the zero is the number 2.5. Option B (2.5, 0) denotes the coordinate point on the plane — a point, not the numeric root. Option C is incorrect because x=0 is not where the graph crosses; Option D is the point on the y‑axis and irrelevant. Exam tip: when asked for a root or zero give the x‑value (a single number), not the ordered pair of the point.
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..
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
