<PRE><B>Question 120484</B>
Calculate the value of the discriminant of x squared plus 4x plus 4 equals zero 
Answer:
Show your work here: 
x^2+4x+4=0
discriminant = sqrt(b^2-4ac)=sqrt(16-4*4)=0
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b)By examining the sign of the discriminant in part a, how many x-intercepts would the graph of y=x squared plus 4x plus 4 have? Why? 
Answer:
The graph touches but does not pass through the x-axis at x=-2.
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{{{graph(400,300,-10,10,-10,10,x^2+4x+4)}}}
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Cheers,
Stan H.

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