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Question

Identify the graph of the polynomial function f
f(x)=x3−2x2−x+2
488933_30453f0a84c447babe68b6c303ec0e10.png

A
graph a
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B
graph b
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C
graph c
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D
graph d
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Solution

The correct option is A graph a

Let y=x32x2x+2

The graph of f(x) in this example is the graph of y=x32x2x+2. It is easy to generate points on the graph.
Choose a value for the first coordinate, then evaluate y at that number to find the second coordinate.
The several values for x and the function y evaluated at those numbers.

If x=0, then y=x32x2x+2=(0)32(0)20+2=2implies the point is (0,2).

If x=1, then y=x32x2x+2=(1)32(1)21+2=121+2=0implies the point is (1,0).

If x=1, then y=x32x2x+2=(1)32(1)2(1)+2=12+1+2=0implies the point is (1,0).

Hence, the graph of the function is shown above.

575521_488933_ans_3b538d61198144829dc7f2d01b34bc50.png

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