What value should be added to the expression to create a perfect square

label Algebra
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x^2-20x

Mar 10th, 2015

x^2-20x=x^2-2*10x

So we need to add 10^2 or 100 to the expression to create a perfect square (x-10)^2

Mar 10th, 2015

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Mar 10th, 2015
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Mar 10th, 2015
Jun 26th, 2017
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