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Assertion (A): The polynomial $$p(x) = x^{2} + 3x + 3$$ has two real zeros. Reason (R): A quadratic polynomial can have at most two real zeros.

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Question

Assertion (A): The polynomial $$p(x)=x^{2}+3x+3$$ has two real zeros.

Reason (R): A quadratic polynomial can have at most two real zeros.

Options

  • Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).

  • Both Assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A).

  • Assertion (A) is true and Reason (R) is false.

  • Assertion (A) is false and Reason (R) is true.

MCQ
Assertion and Reasoning
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Solution

Assertion (A) is false and Reason (R) is true.

Explanation:

Step 1 – Assertion: A is false. For $$p(x)=x^{2}+3x+3,$$ the discriminant is $$3^{2}-4(1)(3)=9-12=-3<0.$$ Hence, the polynomial has no real zeros.

Step 2 – Reason: R is true. A quadratic polynomial has degree two and can have at most two real zeros.

Step 3 – Link: The fact that a quadratic polynomial can have at most two real zeros does not establish that this particular polynomial has two real zeros.

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Chapter 20: Additional Questions - Quadratic Equations [Page 986]

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R.S. Aggarwal Mathematics [English] Class 10
Chapter 20 Additional Questions
Quadratic Equations | Q 2. | Page 986
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