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December 22, 2014

December 22, 2014

Posted by **A** on Friday, April 19, 2013 at 4:55am.

- Maths -
**Reiny**, Friday, April 19, 2013 at 8:23amBecause of the 1 at the end it has to be half of the middle coefficient of the middle term, and then squared

that is, k = 49

check:

49x^2 - 14x + 1

= (7x-1)(7x-1)

=(7x-1)^2

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