Bonsoir,
a → + et b → -
Donc :
a. 9/a → 9/+ a → +
b. a/-3 → +a/- 3 → -
c. b/5 → - b/5 → -
d. (a * b) / - 4 → (+ a * - b) / - 4 → +
e. - b/8a → - (- b)/ + 8 → b/8 → +.
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Bonsoir,
a → + et b → -
Donc :
a. 9/a → 9/+ a → +
b. a/-3 → +a/- 3 → -
c. b/5 → - b/5 → -
d. (a * b) / - 4 → (+ a * - b) / - 4 → +
e. - b/8a → - (- b)/ + 8 → b/8 → +.