Répondre :
bonjour
280 = 2 x 140
140 = 2 x 70
70 = 2 x 35
35 = 5 x 7
7 = 7 x 1
280 = 2 ³ x 5 x 7
Bjr,
280 = 140 * 2 = 70 * 2 * 2 = 35 * 2 * 2 * 2 = 7 * 5 * 2 * 2 * 2.
bonjour
280 = 2 x 140
140 = 2 x 70
70 = 2 x 35
35 = 5 x 7
7 = 7 x 1
280 = 2 ³ x 5 x 7
Bjr,
280 = 140 * 2 = 70 * 2 * 2 = 35 * 2 * 2 * 2 = 7 * 5 * 2 * 2 * 2.