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Sagot :

Bonjour

Développer réduire et ordonner ces expressions suivantes :

(x + 3) (x + 5) - 4x

= x² + 5x + 3x + 15 - 4x

= x² + 5x + 3x - 4x + 15

= x² + 4x + 15

x (3 - 2x) + 5x² + 2x

= 3x - 2x² + 5x² + 2x

= - 2x² + 5x² + 3x + 2x

= 3x² + 5x

(5 - t) (1 + 2t) + 2 (3t + 4)

= 5 + 10t - t - 2t² + 6t + 8

= - 2t² + 10t + 6t - t + 5 + 8

= - 2t² + 15t + 13

2x² (x + 6) - x³ + 4x² - 2x

= 2x³ - 12x² - x³ + 4x² - 2x

= 2x³ - x³ - 12x² + 4x² - 2x

= x³ - 8x² - 2x.

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