A model aeroplane is made to a scale of 1:50. If the span of the wings of the model is 30 cm , what is the actual length of the
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The given function is that is a cubic polynomial
when arranged in descending order that is from highest degree to lowest degree
Since it is a three degree polynomial it has three roots.
According to rational root theorem , the possible roots of the above expression that is factors of =
are
As you can see from the graph all roots of this polynomial are real.
The smallest positive root is 0.954 and smallest negative root are -0.724.
