Réponses

2014-10-11T12:08:23+02:00
Bonjour

A = (30 -170)( 50 -5)
A = - 140 x - 250
A = 35 000 = 3.5 x 10⁴
2014-10-11T12:09:37+02:00
Donner l'écriture scientifique :

A = (3 ×10 - 170) × (5 × 10 - 5)
A = (30 -170) x ( 50 - 5)
A = - 140 x - 250
A = 35 000
A = 3.5 x 10⁴