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kaceykoedel
kaceykoedel kaceykoedel
  • 06-05-2014
  • Mathematics
Answered


 What are the x-intercepts of the quadratic function?
y = –x2 + 2x – 1
(Points : 1)      A. 2 and 1     B.  –2 and 1     C.  2 and –1    D.   1

Verified Answer :

kate200468
kate200468 kate200468
  • 06-05-2014

\(y=-x^2+2x-1=-(x^2-2x+1)=-(x-1)^2\ \ \Rightarrow\ \ y \leq 0\\ \\C.\ x=2\ \ \Rightarrow\ \ \ y=-(2-1)^2=-1\ \ \Rightarrow\ \ (2;-1)\\ \\Ans.\ C\)

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