Bonjour,
si x = 1/2
6x = 6(1/2) = 3
x + 5/2 = 1/2 + 5/2 = 6/2 = 3
si t = 1/2
7t - 1 = 7(1/2) - 1 = 5/2
3t + 2 = 3(1/2) + 2 = 7/2
si x = 1/2
4x² = 4(1/2)² = 4(1/4) = 1
si x = 1/2
2x² + 1 = 2(1/2)² + 1 = 2/4 + 1 = 6/4 = 3/2
3x = 3(1/2) = 3/2
Zalie se trompe : 1/2 est solution de 2 de ces équations (la 1 et la 4)
