Question
bonsoir qui pourrait m'aider dans mon exercices c'est pour lundi matin merci d'avance
Soit l’expression G = (8 − 7t)(5t − 1) − (8 − 7t)(1 + 4t)
1. Développer et réduire l’expression G.
2. Factoriser l’expression G.
3. Calculer G pour t = −1/4
.
Soit l’expression G = (8 − 7t)(5t − 1) − (8 − 7t)(1 + 4t)
1. Développer et réduire l’expression G.
2. Factoriser l’expression G.
3. Calculer G pour t = −1/4
.
Asked by: USER6462
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293 Answers
Answer (293)
1.
(8-7t)(5t-1)-(8-7t)(1+4t) =
40t-8-35t²+7t-(8+32t-7t-28t²) =
40t-8-35t²+7t-8-32t+
7t+28t² =
-35t²+28t²+40t+7t-32t+7t-8 -8 =
-7t²+22t-16
2. (8-7t)(5t-1)-(8-7t)(1+4t) = (8-7t) ((5t-1)-(1+4t)) = (8-7t) (5t-1-1-4) = (8-7t) (5t-6)
40t-8-35t²+7t-(8+32t-7t-28t²) =
40t-8-35t²+7t-8-32t+
7t+28t² =
-35t²+28t²+40t+7t-32t+7t-8 -8 =
-7t²+22t-16
2. (8-7t)(5t-1)-(8-7t)(1+4t) = (8-7t) ((5t-1)-(1+4t)) = (8-7t) (5t-1-1-4) = (8-7t) (5t-6)