The number of positive and negative roots or zeros of a polynomial function is predicted through the Descartes Rule of Sign. This was first described by Rene Descartes in his work La Geometrie. The technique is for determining an upper bound on the number of positive and negative real roots.
Answer:
B
Explanation:
10x1=10
(not sure haven’t done this in a very long time)
i is defined as the square root of -1 or 
Answer:
Length: 30m
Width: 12m
Step-by-step explanation:
Length: 2x+6 meters Width: x meters
2(2x+6) meters + 2(x) meters
4X+12 +2x = 84 meters
6x+12 = 84 meters
6x = 72 meters
x = 12 meters
