Bonsoir,

a. 13 * 102 = 13 * (100 + 2) = 13 * 100 + 13 * 2 = 1 300 + 26 = 1 326

b. 5,4 * 11 = 5,4 * (10 + 1) = 5,4 * 10 + 5,4 * 1 = 54 + 5,4 = 59,4

c. 35 * 99 = 35 * (100 - 1) = 35 * 100 - 35 * 1 = 3 500 - 35 = 3 465

d. 2 * (z - 8) = 2z - 16

d. 2 * (2 * v - 1) = 4v - 8

e. w * (w - 5) = w² - 5w.