## Encyclopedia > Projection

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# Projection

The word projection can mean more than one thing.

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 Quadratic formula ... as a single fraction; the common denominator is 4a2. We get $\left(x+\frac{b}{2a}\right)^2=\frac{-4ac+b^2}{4a^2}=\frac{b^2-4ac}{4a^2}.$ Taking ...