Sagot :
Bonjour,
A=
8x +15 -2y
B=
9x² +3 * (2-5x)
= 9x² + 6 -15x
C=
3xy + (5x-2) * ( 0)
= 3xy + 5x-2
D=
-6x -2( -5x+1) +y +xy
= -6x +x -2 +y +xy
= -5x -2 +y +xy
E=
(-3x +4y) *( 2xy+1)
= - 6x²y -3x + 8 xy² +4y
Bonjour,
A=
8x +15 -2y
B=
9x² +3 * (2-5x)
= 9x² + 6 -15x
C=
3xy + (5x-2) * ( 0)
= 3xy + 5x-2
D=
-6x -2( -5x+1) +y +xy
= -6x +x -2 +y +xy
= -5x -2 +y +xy
E=
(-3x +4y) *( 2xy+1)
= - 6x²y -3x + 8 xy² +4y