Lambert was born in Mülhausen (now Mulhouse[?], Alsace, France)
He died in Berlin, Prussia (today Germany).
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... fraction; the common denominator is 4a2. We get <math>\left(x+\frac{b}{2a}\right)^2=\frac{-4ac+b^2}{4a^2}=\frac{b^2-4ac}{4a^2}.</math> Taking square ...