SOLUTION: Okay, I am completely confused here....x^2+18x+81 is a perfect square because (x+9)(x+9), However, I need help with figuring out if x^2-2x-1 is a perfect square, so far I am thinki

Algebra ->  Radicals -> SOLUTION: Okay, I am completely confused here....x^2+18x+81 is a perfect square because (x+9)(x+9), However, I need help with figuring out if x^2-2x-1 is a perfect square, so far I am thinki      Log On


   

Question 89354: Okay, I am completely confused here....x^2+18x+81 is a perfect square because (x+9)(x+9), However, I need help with figuring out if x^2-2x-1 is a perfect square, so far I am thinking that it's not? But is it? Please help...Thanks
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
No. It would have to be x^2-2x+1 which is (x-1)(x-1)
Cheers,
Stan H.