Comment on A new way to make quadratic equations easyComments−shikoba6y(r-s)^2=r^2-2rs+s^2=(r+s)^2-4rs=b^2-4cr=((r-s)+(r+s))/2=(sqrt(b^2-4c)-b)/2
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(r-s)^2=r^2-2rs+s^2=(r+s)^2-4rs=b^2-4c
r=((r-s)+(r+s))/2=(sqrt(b^2-4c)-b)/2