It was designed and constructed over the period from 1925 to 1975 by Sir Clough Williams-Ellis[?] (1883-1978).
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... 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 roots of both ...