Bonjour pouvez vous m'aider s'il vous plaît ?
Question
1 Réponse
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1. Réponse maudmarine
Bonsoir,
h (x) = (3x - 2)² - 16
a)
h (x) = (3x - 2)² - 16
h (0) = (3 * 0)² - 16
h (0) = - 16
h (x) = (3x - 2)² - 16
h (- 1) = (3 * - 1 - 2)² - 16
h (- 1) = (- 3 - 2)² - 16
h (- 1) = (- 5)² - 16
h (- 1) = 25 - 16
h (- 1) = 9
h (x) = (3x - 2)² - 16
h (3) = (3 * 3 - 2)² - 16
h (3) = (9 - 2)² - 16
h (3) = 7² - 16
h (3) = 49 - 16
h (3) = 33
b) h (x) = (3x - 2)² - 16
h (x) = (3x - 2)² - 16 = - 16
(3x - 2)² = - 16 + 16
(3x - 2)² = 0
(3x - 2) = 0
3x = 2
x = 2/3
c) h (x) = (3x - 2)² - 16 = - 25
h (x) = (3x - 2)² - 16 + 25 = 0
h (x) = (3x - 2)² + 9 = 0
h (x) = (3x - 2 - 3) (3x - 2 + 3) = 0
h (x) = (3x - 5) (3x + 1) = 0
3x - 5 = 0 ou 3x + 1 = 0
3x = 5 3x = - 1
x = 5/3 x = - 1/3