SOLUTION: Please help me with this question? How can I best describe this? {{{-x^2+2x-1}}}

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Question 144191: Please help me with this question?
How can I best describe this? -x%5E2%2B2x-1
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Well -x%5E2%2B2x-1 factors to -%28x-1%29%28x-1%29=-%28x-1%29%5E2 which means that it's a perfect square. So the best description is that -x%5E2%2B2x-1 is a perfect square.