If the graph of a polynomial cuts the x-axis at the point (10, 0), which of the following statements is correct?
Answer and explanation
Correct answer: (10) is a zero
A point (a, 0) where the graph meets the x-axis means the polynomial p(x) satisfies p(a) = 0. Here p(10) = 0, so 10 is a root (zero) of the polynomial. Option D is incorrect because the constant term is the value of the polynomial at x = 0 (the y-intercept), not the x-coordinate of an x-intercept. Options B and C are wrong since the x-coordinate of the intercept given is 10, not 0 or −10. Exam tip: the x-coordinate of an x-axis intersection gives the root directly — read the coordinate to identify the zero.
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What is the correct answer to this question?
(10) is a zero
Why is this the correct answer?
A point (a, 0) where the graph meets the x-axis means the polynomial p(x) satisfies p(a) = 0. Here p(10) = 0, so 10 is a root (zero) of the polynomial. Option D is incorrect because the constant term is the value of the polynomial at x = 0 (the y-intercept), not the x-coordinate of an x-intercept. Options B and C are wrong since the x-coordinate of the intercept given is 10, not 0 or −10. Exam tip: the x-coordinate of an x-axis intersection gives the root directly — read the coordinate to identify the zero.
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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