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Mathematics, 28.11.2021 19:20 dejahg4530

If C=r-8 and D=-r^{2}+8r+7, find an expression that equals 2C+2D2C+2D in standard form.

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If C=r-8 and D=-r^{2}+8r+7, find an expression that equals 2C+2D2C+2D in standard form....

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