Explications étape par étape:
C = (x×x) + (x×3) + (2×x) + (2×3) =
x² + 3x + 2x + 6 = x² + 5x + 6
D = (x×x) + (x×1) + (-5×x) +(-5×1) =
x² + x -5x -5 = x² -4x -5
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Explications étape par étape:
C = (x×x) + (x×3) + (2×x) + (2×3) =
x² + 3x + 2x + 6 = x² + 5x + 6
D = (x×x) + (x×1) + (-5×x) +(-5×1) =
x² + x -5x -5 = x² -4x -5