Bonsoir,
(2x +3)(5x −4)−5(3x −2) = 10x² −8x −2
2x * 5x + 2x * (-4) + 3 * 5x + 3 * (-4) - 5 * 3x - 5 * (-2) = 10x² −8x −2
10x² - 8x + 15x - 12 - 15x + 10 = 10x² −8x −2
10x² - 8x - 2 = 10x² −8x −2
Donc c'est vrai
Bonne soirée.
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Bonsoir,
(2x +3)(5x −4)−5(3x −2) = 10x² −8x −2
2x * 5x + 2x * (-4) + 3 * 5x + 3 * (-4) - 5 * 3x - 5 * (-2) = 10x² −8x −2
10x² - 8x + 15x - 12 - 15x + 10 = 10x² −8x −2
10x² - 8x - 2 = 10x² −8x −2
Donc c'est vrai
Bonne soirée.