CBSE Class 10 Polynomials MCQs – Zeros of a Polynomial and Graphical Meaning
CBSE Class 10 Mathematics – Polynomials MCQs
Chapter 2: Polynomials
Topic: Zeros of a Polynomial & Graphical Meaning
Based on NCERT | As per Latest CBSE Board Examination Pattern
1. The zero of a polynomial p(x) is the value of x for which:
Correct Answer: B. p(x) = 0
Explanation: A zero of a polynomial is the value of x that makes the polynomial equal to zero.
Explanation: A zero of a polynomial is the value of x that makes the polynomial equal to zero.
2. The number of zeroes of a polynomial is equal to:
Correct Answer: B
Explanation: Graphically, the zeroes are the x-coordinates where the graph intersects the x-axis.
Explanation: Graphically, the zeroes are the x-coordinates where the graph intersects the x-axis.
3. A linear polynomial has:
Correct Answer: B
Explanation: A linear polynomial ax + b intersects the x-axis at exactly one point.
Explanation: A linear polynomial ax + b intersects the x-axis at exactly one point.
4. The graph of a quadratic polynomial can intersect the x-axis at most:
Correct Answer: B
Explanation: A quadratic polynomial (degree 2) can have at most 2 real zeroes.
Explanation: A quadratic polynomial (degree 2) can have at most 2 real zeroes.
5. If graph does not intersect x-axis, number of zeroes is:
Correct Answer: A
Explanation: If graph does not meet x-axis, polynomial has no real zero.
Explanation: If graph does not meet x-axis, polynomial has no real zero.
6. Degree of polynomial 5x³ + 2x² + x is:
Correct Answer: C
Explanation: Highest power of x is 3, so degree is 3.
Explanation: Highest power of x is 3, so degree is 3.
7. A cubic polynomial can have at most:
Correct Answer: C
Explanation: A polynomial of degree 3 can have at most 3 zeroes.
Explanation: A polynomial of degree 3 can have at most 3 zeroes.
8. If α is a zero of p(x), then p(α) equals:
Correct Answer: C
Explanation: By definition, α is zero if p(α)=0.
Explanation: By definition, α is zero if p(α)=0.
9. Graph of constant polynomial y = 5 has:
Correct Answer: C
Explanation: Line y=5 never meets x-axis.
Explanation: Line y=5 never meets x-axis.
10. If graph touches x-axis but does not cut it, number of zeroes is:
Correct Answer: B
Explanation: Touching point represents one real zero.
Explanation: Touching point represents one real zero.
11. Maximum number of zeroes of degree n polynomial is:
Correct Answer: B
Explanation: A polynomial of degree n has at most n zeroes.
Explanation: A polynomial of degree n has at most n zeroes.
12. Number of zeroes of polynomial represented by a straight line parallel to x-axis (not x-axis):
Correct Answer: A
Explanation: Such line never meets x-axis.
Explanation: Such line never meets x-axis.
13. Polynomial x² − 4 has zeroes:
Correct Answer: A
Explanation: x² − 4 = 0 ⇒ x²=4 ⇒ x=±2.
Explanation: x² − 4 = 0 ⇒ x²=4 ⇒ x=±2.
14. Graph of y = x² always opens:
Correct Answer: B
Explanation: Coefficient of x² is positive.
Explanation: Coefficient of x² is positive.
15. If polynomial has degree 0, it is called:
Correct Answer: C
Explanation: Degree 0 polynomial is constant.
Explanation: Degree 0 polynomial is constant.
16. If graph cuts x-axis at three points, degree is at least:
Correct Answer: C
Explanation: It must be degree 3 or more.
Explanation: It must be degree 3 or more.
17. Zeroes of polynomial are always:
Correct Answer: B
Explanation: Zeroes correspond to x-intercepts.
Explanation: Zeroes correspond to x-intercepts.
18. Which polynomial has exactly one zero?
Correct Answer: B
Explanation: Linear polynomial always has exactly one zero.
Explanation: Linear polynomial always has exactly one zero.
19. The graph of y = 0 represents:
Correct Answer: A
Explanation: y=0 is equation of x-axis.
Explanation: y=0 is equation of x-axis.
20. A quadratic polynomial with no real zeroes has graph that:
Correct Answer: C
Explanation: If graph does not meet x-axis, polynomial has no real zeroes.
Explanation: If graph does not meet x-axis, polynomial has no real zeroes.
