Bonjour
I = (2x)² + 2*2x*1 + 1 - 4
= 4x² + 4x - 3
I = ( 2x + 1 ) ² - 4
= ( 2x + 1 )² - 2²
= ( 2x + 1 - 2 ) ( 2x + 1 + 2 )
= ( 2x - 1 ) ( 2x + 3)
calculer pour x = -3/2
I = 4x² + 4x - 3
I = 4*(-3/2)² + 4*-3/2 - 3
= 4 * 9/4 + -12/2 - 3
= 9 - 6 - 3 = 9-9 = 0
Bonne journée
