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Mathematics, 11.02.2020 06:19 pinklavalamp

(x + 5)(x + 4) = x2 + 5x + 4x + 20 = x2 + 9x + 20

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(x + 5)(x + 4) = x2 + 5x + 4x + 20 = x2 + 9x + 20...

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