SOLUTION: complete the trinomial such that it's a perfect square: y=x^2+__x+81

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Question 550292: complete the trinomial such that it's a perfect square: y=x^2+__x+81
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
complete the trinomial such that it's a perfect square: y=x^2+__x+81
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c = (b/2a)^2 = 81
a = 1
b/2a = 9
b/2 = 9
b = 18
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--> y+=+x%5E2+%2B+18x+%2B+81+=+%28x%2B9%29%5E2