Bonsoir;

x=0

A=0-2*0 +3

=3

x= 3

3²-2*3 +3

= 9-6+3

= 6

x= -3

(-3)²  -( 2*-3) +3

= 9 +6+3

= 18

je ne peux pas lire le dernier

Bonsoir,

A = x² - 2x + 3

x = 0

A(0) = 0² - 2 × 0 + 3 = 0 - 0 + 3 = 3

x = 3

A(3) = 3² - 2 × 3 + 3 = 9 - 6 + 3 = 3 + 3 = 6

x = - 3

A(- 3) = (- 3)² - 2 × (-3) + 3 = 9 + 6 + 3 = 9 + 9 = 18