Bonjour,
a)
16x² -16x +4 +8x² -12x -4x +6
= 24x² -32x +10
b)
(4x-2)² + (4x-2) (2x-3)
= (4x-2) ( 4x-2 +2x-3)
= (4x-2) ( 6x -5)
c)
(4x-2) ( 6x -5) = 0
équation produit nul
soit
4x-2 = 0
4x= 2
x= 2/4 = 1/2 =0,5
soit
6x-5 = 0
6x = 5
x = 5/6
d)
(4*-1-2)² + (4*-1-2) (2*-1-3)
= ( -4-2)² + (-4-2)(-2-3)
= (-6)² + (-6 )( -5)
= 36 + 30
= 66