Bonjour, Factoriser les expressions suivantes : 7a + 21 = 14a - 35 = 10x + 5 =

Bonjour,

7a + 21 = 7 * a + 7 * 3 = 7(a + 3)

14a - 35 = 7 * 2 * a - 7 * 5 = 7(2a - 5)

10x + 5 = 5 * 2 * x + 5 = 5(2x + 1)

7a+21 =

7a+7×3 =

7×(a+3)

14a-35=

14a-14×2,5=

14×(a-2,5)

10x+5=

5×5x+5=

5×(x+5)