point "b" has coordinates of -2,-5 after a translation 4 units down a reflection across the y axisand a translation 6 units up w
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There is only one change of sign, so there is only one possible positive root.
There are five changes of signs, so there are 5,3 or 1 possible negative roots.
The number of complex roots can be equal to 4,2 or 0 (degree of a polynomial - possible positive roots - possible negative roots)