bonsoir
7 x + 10 = 4 x - 3
7 x - 4 x = - 3 - 10
3 x = - 13
x = - 13 /3
6 x² - 8 x = 6 x² - 3 x - 8 x + 4
6 x² - 6 x² - 8 x + 8 x = 4
0 x = 4
pas de solution
premier = x
second = x + 1.2
troisième = x - 0.5
x + x + 1.2 + x - 0.5 = 4.6
3 x = 4.6 - 1.2 + 0.5
3 x = 3.9
x = 1.3
premier = 1.3 m - second = 2.5 m - troisième = 0.8 m
7.5 ² = 7 x 8 + 0.25 = 56.25
3.5 ² = 3 x 4 + 0.25 = 12.25
10.5² = 10 x 11 + 0.25 = 110.25
