Bonsoir,
1) E = (5 + 2c)(3 + 5c)
Pour c = -4
E = (5 + 2 × (-4))(3 + 5 × (-4))
E = (5 - 8)(3 - 20)
E = (-3) × (-17)
E = 51
2) F = 3d² - 5d + 3
Pour d = -2
F = 3 × (-2)² - 5 × (-2) + 3
F = 3 × 4 + 10 + 3
F = 12 + 10 + 3
F = 22 + 3 = 25
Bonne soirée !
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Bonsoir,
1) E = (5 + 2c)(3 + 5c)
Pour c = -4
E = (5 + 2 × (-4))(3 + 5 × (-4))
E = (5 - 8)(3 - 20)
E = (-3) × (-17)
E = 51
2) F = 3d² - 5d + 3
Pour d = -2
F = 3 × (-2)² - 5 × (-2) + 3
F = 3 × 4 + 10 + 3
F = 12 + 10 + 3
F = 22 + 3 = 25
Bonne soirée !