SOLUTION: What number should be added to complete the square of the expression? x^2-1/3x

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Question 224086: What number should be added to complete the square of the expression?
x^2-1/3x
Found 2 solutions by rapaljer, MathTherapy:
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
The rule, if the coefficient of the x^2 term is 1, is to take HALF of the middle term coefficient, and SQUARE it!

In this case, take half of -1/3, and square it, which gives you 1/9.

R^2

Answer by MathTherapy(10555) About Me  (Show Source):
You can put this solution on YOUR website!
What number should be added to complete the square of the expression?
x^2-1/3x

You take 1%2F2 of "b," which happens to be 1%2F2 of 1%2F3, wich equals 1%2F6. You square this fraction to get: highlight_green%281%2F36%29, which you then add.