SOLUTION: Give exact and approximate solutions to three decimal places: y^2-2y+1=100 If I follow the example in the book, I get the wrong answer. I am confused as how to work this prob

Question 486294: Give exact and approximate solutions to three decimal places:
y^2-2y+1=100
If I follow the example in the book, I get the wrong answer. I am confused as how to work this problem. Thank you for any help you are able to give.
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
Give exact and approximate solutions to three decimal places:
y^2-2y+1=100.
***
To find the zeros you can either factor or use the quadradic formula.
Factoring: set expression = zero, use trial and error method, then check using FOIL.
y^2-2y-99=0
..
Quadratic formula: For given equation, a=1, b=-2, and c=-99
ans:
y=-9 or 11
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