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-1/500 (15)4 - (-1/800) (5)4

Mathematics

ScanSolve AI Answer

Answer

-62,5

Step-by-step solution

4 steps

Pour résoudre cette expression, nous allons suivre les étapes d'opération.

  1. Factoriser le terme commun −1800\frac{-1}{800}.

    −1800(15)4−−1800(5)4=−1800((15)4−(5)4)\frac{-1}{800} (15)^4 - \frac{-1}{800} (5)^4 = \frac{-1}{800} \left( (15)^4 - (5)^4 \right)
  2. Calculer les puissances.

    154=15×15×15×15=50 62515^4 = 15 \times 15 \times 15 \times 15 = 50\,625 54=5×5×5×5=6255^4 = 5 \times 5 \times 5 \times 5 = 625
  3. Substituer les valeurs calculées dans l'expression et effectuer la soustraction.

    −1800(50 625−625)=−1800(50 000)\frac{-1}{800} (50\,625 - 625) = \frac{-1}{800} (50\,000)
  4. Effectuer la multiplication et simplifier la fraction.

    −50 000800=−5008=−1252\frac{-50\,000}{800} = \frac{-500}{8} = \frac{-125}{2}

    En valeur décimale, cela donne :

    −1252=−62,5\frac{-125}{2} = -62,5

    Le résultat final est :

    −62,5-62,5
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