SOLUTION: {{{ x^2 - 2kx + 49 }}} is the square of a binomial. What is a possible value of k?

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Question 965141: +x%5E2+-+2kx+%2B+49+ is the square of a binomial. What is a possible value of k?
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
%28x%2B7%29%5E2=x%5E2%2B14x%2B49

Corresponding positions of terms forces -2k=14.
k=-7

Understand that also %28x-7%29%5E2=x%5E2-14x%2B49,.....

Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!

+x%5E2+-+2kx+%2B+49+ is the square of a binomial. What is a possible value of k?
highlight_green%28k+=+7%29