Website Statistics 345x10x8x comment calculer

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-3 * 4 - (-3) * 5x -10x² + 8x 
= -12 +15x -10x² + 8x
= -12 +23x -10x²
= -10x² +23x -12
ca fait ; -12+20x -100x^2+8x
         -12+28x -100x^2

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