Concept explainers
a.
Finding zeros of a Polynomial function algebraically.
a.
Explanation of Solution
Given:
The equation is
Approach:
- Solve the Polynomial algebraically.
- Find the values of x.
Calculation:
Consider,
Putting the value of
Therefore, the real zeros of a polynomial function are
b.
Use a graphing utility to graph the function.
b.
Explanation of Solution
Given:
The equation is given as,
Approach:
- Draw the given equations on the graph.
Graph; The graph of the above equations are given below
Since the above graph intersect x-axis at many points.
Therefore, the polynomial has many zeros.
c.
Use the graph to compare them with those from part (a).
c.
Explanation of Solution
Given:
The equation is
Approach:
- Draw the given equations on the graph.
- Compare them with the part -a.
Graph:
The graph of the above equations are given below
This shows that the zeros of the polynomial are
While here, all the zeros were represented by the graph actually crossing through the x-axis.
Chapter 2 Solutions
PRECALCULUS W/LIMITS:GRAPH.APPROACH(HS)
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