Verified Solution Mathematics Polynomials

Assertion (A): The polynomial x⁴ + 4x² + 5 has two real zeros. Reason (R): The degree of a polynomial is the number of its real zeros.

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Solution ✔ Verified
  • ABoth A and R are true and R is the correct explanation of A.
  • BBoth A and R are true but R is not the correct explanation of A.
  • CA is true but R is false.
  • DA is false but R is true.
Explanation

A is false because if we let y=x², the polynomial becomes y²+4y+5. The discriminant is 4² - 4(1)(5) = 16-20 = -4 < 0, so there are no real values for y, and thus no real values for x. R is false as the degree is the maximum number of real zeros, not necessarily the exact number.

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