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en.wikipedia.org/wiki/Completing_the_square

In elementary algebra, completing the square is a technique for converting a quadratic polynomial of the form. a x 2 + b x + c {\displaystyle ax^{2}+bx+c} ...

www.mathsisfun.com/algebra/completing-square.html

But if you have time, let me show you how to "Complete the Square" yourself. Completing the Square. Say we have a simple expression like x2 + bx. Having x  ...

www.khanacademy.org/math/algebra/quadratics/solving-quadratics-by-completing-the-square/v/solving-quadratic-equations-by-completing-the-square

For example, x²+6x+5 isn't a perfect square, but if we add 4 we get (x+3)². This, in essence, is the method of *completing the square*. Created by Sal Khan, ...

www.khanacademy.org/math/algebra/quadratics/solving-quadratics-by-completing-the-square/a/solving-quadratic-equations-by-completing-the-square

For example, solve x²+6x=-2 by manipulating it into (x+3)²=7 and then taking the square root.

www.purplemath.com/modules/sqrquad.htm

Demonstrates, with step-by-step instructions and illustrations, how to complete the square to solve a quadratic equation.

www.ask.com/youtube?q=Completing+the+Square&v=bclm1tJB-3g
Jan 9, 2014 ... MIT grad shows the easiest way to complete the square to solve a quadratic equation. More videos with Nancy coming in 2017! To skip ahead: ...
www.ask.com/youtube?q=Completing+the+Square&v=xGOQYTo9AKY
Nov 2, 2008 ... Extra Examples : http://www.youtube.com/watch?v=zKV5ZqYIAMQ&feature= relmfu http://www.youtube.com/watch?v=Q0IPG_BEnTo Another ...
www.ask.com/youtube?q=Completing+the+Square&v=gzm-uhj06q8
Jun 17, 2008 ... I am in class 12 now (grade 12 for you Americans) and it took me this much time to realize that when a number is shifted across equals sign,we ...

www.mathplanet.com/education/algebra-1/quadratic-equations/completing-the-square

we can't use the square root initially since we do not have c-value. But we can add a constant d to both sides of the equation to get a new equivalent equation ...