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Polynomials — Maths STD 10 — Question

CBSE BoardEnglish MediumSTD 10MathsPolynomials1 Mark
MCQ
The polynomial $9 x^2+6 x+4$ has :
  • A
    One real zero
  • B
    Two real zeroes
  • C
    Many real zeroes
  • ✓
    No real zeroes
✓

Answer

Correct option: D.
No real zeroes
The polynomial $9 x^2+6 x+4$ has no real zeroes because it can not be factorized.
$D=b^2-4 a c, D=36-4 \times 9 \times 4=-108$
Roots are imaginary and unequal

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