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January 27, 2015

January 27, 2015

Posted by **ios7** on Thursday, September 19, 2013 at 10:54pm.

Sum of X

Sum of Squares

Sum of X squared

- Math -
**Steve**, Thursday, September 19, 2013 at 11:32pmsum of x is meaningless

sum of squares.

a^2 + b^2

3^2 + 4^2

x^2 + y^2

sum of x^2 is meaningless

a sum need two addends.

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