bonjour
O = 2 x - 5
tu remplaces x par 3
O = 2 *3 - 5 = 6 - 5 = 1
Q = 8 x² - 13 x
= 8 * 3² - 13 *3 = 72 - 39 = 33
S = - 10 x + 7
= - 10 * 3 + 7
= - 30 + 7 = - 23
P = - 6 x² + 27
= - 6 ( 3 )² + 27 = - 54 + 27 = - 27
R = 25 - 5 x²
= 25 - 5 *3² = 25 - 45 = - 20
T = 4 x² - 4 x
= 4 * 3² - 4 *3
= 36 - 12 = 24
bonne fin d'AM