Bonjour ^^
A = 3 ; B = 2 ; C = -0.5
1)
D = b + c - 2a
D = b + c - 2 × a
D = 2 + (-0.5) - 2 × 3
D = 2 - 0.5 - (2×3)
D = 2 - 0.5 - 6
D = 2 - 6.5
D = -4.5
E = bc ÷ a
E = b × c ÷ a
E = 2 × (-0.5) ÷ 3
E = -2 × [tex] \frac{5}{10} [/tex] × [tex] \frac{1}{3} [/tex]
E = -2 × [tex] \frac{1}{2} [/tex] × [tex] \frac{1}{3} [/tex]
E = -1 × [tex] \frac{1}{3} [/tex]
E = - [tex] \frac{1}{3} [/tex]
≈ -0.33
F = b² - 4ac
F = b² - 4 × a × c
F = 2² - 4 × 3 × (-0.5)
F = 4 + 4 × 3 × 0.5
F = 4 + 2 × 3
F = 4 + 6
F = 10
J'espère vous avoir aidé ^-^
