E=(2x-3)²+(2x-3)(x+8) Calculez E quand x = 3/2 ( fraction trois demi )

Quand x=3/2  E vaut 0

en effet 2x-3  quand x=3/2  vaut 2*3/2 -3 =3-3=0
CQFD

E = (2x - 3)² + (2x - 3) (x + 8)
Calculez E quand x = 3/2

E = (2 * 3/2 - 3)² + (2 * 3/2 - 3) (3/2 + 8)
E = (6/2 - 3)² + (6/2 - 3) (3/2 + 8)
E = (6/2 - 6/2)² + (6/2 - 6/2) (3/2 + 16/2)
E = 0