Bonsoir,
exercice 1
20x -32x² -35 +56x -(16x² -64x +64)=
20x -32x² -35 +56x -16x² +64x -64=?
16x² +40x +25 -( 4x²+32x +64) =
16x² +40x +25 - 4x²-32x -64 =?
Exercice 2
(5x-4)(5x-4 -7+8x)= ?
(5x-10)(5x+10)
Exercice 3
32x +48 = -4 +3x
32x -3x = -4 -48
29x = -52
x = -52/9
Je te laisse terminer les 3 opérations
