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Mathematics, 20.04.2020 04:00 fatlenny

Tracy needs a sheet of paper x cm by 22 cm for an origami giraffe. The local origami supply store only sells square sheets of paper.
The lower portion of the image below shows the excess area A of paper that will be left after Tracy cuts out the x cm by 22 cm piece.
The excess area, in cm?, is given by the equation A = x(x - 22).

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