SOLUTION: X^2 + 2X +1 = 81 How do I solve this?

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Question 191175This question is from textbook
: X^2 + 2X +1 = 81
How do I solve this? This question is from textbook

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
X^2 + 2X +1 = 81
How do I solve this?
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Step 1, set it up in standard quadratic form.
x^2 + 2x - 80 = 0
Then the options are factoring, completing the square or using the quadratic formula.
This one is easily factored.
(x+10)*(x-8) = 0
x = -10
x = 8