Sagot :
Bonjour,
-3x (-2x+6)-x (4x-2)
= 6x² -18x -4x² +2x
= 2x² -16x
6 (2x-5)+2x (4x-10)
= 12x -30 + 8x² -20x
=?
je te laisse faire les opérations
-4 (6-5x)-9x (2x+3)
= -24 +20x -18x² -27x
=?
-5x (2x-7)+4 (3-8x)
= -10x² +35x +12 -24x
=
(8+2x)×3+7 (3x-5)
=24 +6x +21x -35
=
-3x (4x-8)+5x (-7+2x)
= -12x² +24x -35x +10x²
=
5x (6-7)+x (8-2x)
=30x -35x +8x -16x
=
4x (-2x+3)+2x (3x-5)
= -8x² +12x +6x² -10x
=
2 (5-2x)-2x (4+5x)
=10 -4x -8 -10x²
=
7x (3x-2)-2x (-6+x)
21x² -12 +30 +5x
=
-4 (x+3)+5 (6+x)
= -4x -12 +30 +5x
=
6x (3x+4)-4 (5x+3)
= 18x² +24x -20x -12
=