<PRE><B>Question 248987</B>
Use the quadratic formula to determine the x-intercepts (if any) of the following function. Then evaluate the function for several values of x, and use the resulting points to graph the function. Show your work; 
f(x) = -x^2 + 2x - 1
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a = -1 ; b = 2 ; c = -1
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x = [-2 +- sqrt(4 - 4*-1*-1)]/-2
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x = [-2 +- sqrt(0)]/-2
x = 1 with multiplicity two
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{{{graph(400,300,-10,10,-10,10,-x^2+2x-1)}}}
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Cheers,
Stan H.</PRE>