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Q.

If the graph of the quadratic polynomial is completely above or below the x-axis, then the nature of the polynomial root is ____________.

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a

Real

b

Distinct

c

Real and distinct

d

Complex

answer is D.

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Detailed Solution

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The given graph is completely above or below the x-axis, hence it has no real root. 

If a polynomial has real roots, then it cuts the x-axis. If the graph lies above or below x - axis, the roots are complex.  

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